1. 谁有初二英语下学期所有语法知识点 急求！
你要什么版本的？？人教版？？
2. 初二英语下册语法重点
下册主要就是被动语态啦被动语态的主要用法
一．定义
语态是动词的一种形式，它表示主语和谓语的关系。语态有两种：主动语态和被动语态。如果主语是动作的执行者，或者是说动作是由主语完成的，要用主动语态；如果主语是动作的承受者，或者是说动作不是由主语而是由其他人完成的，则用被动语态。
■当不知道或没有必要指出动作的执行者时，常用被动语态，这时往往不用by短语。
The front window in the classroom was broken yesterday. 昨天，教室的前窗被打破了。(不知谁打破的)
They have been poorly paid. 他们的工资太低。(没必要指出工资是谁付的)
■突出或强调动作的承受者，如果需要说出动作的执行者，用by短语。
The time-table has been changed. 时间表已变动了。(要突出的是“时间”)
These books are written especially for children. 这些书是专门为孩子们写的。(强调的是“”这些书)
■为了使语言得体或圆滑等不愿意说出动作的执行者。如：
You are requested to make a speech at next meeting. 请您在下次会议上作个发言。
It is said that she is going to be married to a foreigner. 据说她要嫁给一个外国人。
■出于修辞的原因，或是说为了更好地安排句子。如：
The notion is especially opposed to by those who have invested much in the area. 这个提议特别遭到了那些在本地区投资很大的人的反对。(因those的定语太长了，若用它作主语，主语与谓语就相距太远而显得句子松散。)
8种常用时态的被动语态
由“助动词be + 动词的过去分词”构成。助动词be 有时态、人称和数的变化。
(1) 一般现在时：am/is/are +过去分词。如：
Rice is grown in south China. 华南种植水稻。
(2) 一般过去时：was/were+过去分词。如：
The glass was broken yesterday. 这块玻璃是昨天打烂的。
(3) 现在进行时：am/is/are being +过去分词。如：
The project is being carried out. 这个计划正在执行中。
(4) 过去进行时：was/were/being +过去分词。如：
This road was being built this time last year. 这条路去年这个时候还在修建。
(5) 一般将来时：will be +过去分词。如：
The cars will be sent abroad by sea. 这些汽车将由水路运往国外。
(6) 过去将来时：would be +过去分词。如：
The manager said the project would be completed by the end of the year. 经理说这个工程在年底前将会完成。
(7) 现在完成时：have/has been +过去分词。如：
This novel has been translated into several languages. 这本小说已被译成了几种语言。
(8) 过去完在时：had been +过去分词。如：
When I got to the theatre, I found the tickets had already been sold out. 我到达剧院时，发现票已卖完了。
3. 初二英语知识点有哪些，语法有哪些
Unit1 Where did you go on vacation?
go on vacation去度假
stay at home待在家里
go to the mountains去爬山
go to the beach去海滩
visit museums 参观博物馆
go to summer camp去参观夏令营
quite a few相当多
study for为……而学习
go out出去
most of the time大部分时间
taste good尝起来很好吃
have a good time玩得高兴
of course当然
feel like给……的感觉；感受到
go shopping去购物
in the past在过去
walk around四处走走
because of因为
one bowl of… 一碗……
the next day第二天
drink tea喝茶
find out找出；查明
go on继续
take photos照相
something important重要的事
up and down上上下下
come up出来
buy sth. for sb. / buy sb. sth.为某人买某物
taste + adj. 尝起来……
look+adj. 看起来……
nothing…but+动词原形
除了……之外什么都没有
seem+（to be）+ adj. 看起来……
arrive in+大地点 / arrive at+小地点
到达某地 decide to do sth.决定去做某事
try doing sth.尝试做某事 / try to do sth.尽力去做某事
forget doing sth.忘记做过某事/ forget to do sth.忘记做某事
enjoy doing sth.喜欢做某事
want to do sth.想去做某事
start doing sth.开始做某事
stop doing sth. 停止做某事
dislike doing sth. 不喜欢做某事
keep doing sth.继续做某事
Why not do. sth.?为什么不做……呢？
so+adj.+that+从句
如此……以至于……
tell sb. (not) to do sth. 告诉某人（不要）做某事
Unit2 How often do you exercise?
help with housework帮助做家务
on weekends在周末
how often多久一次
hardly ever几乎从不
once a week每周一次
twice a month每月两次
every day每天
be free有空
go to the movies去看电影
use the Internet用互联网
swing dance摇摆舞
play tennis打网球
stay up late熬夜；睡得很晚
at least至少
have dance and piano lessons上舞蹈课和钢琴课
go to bed early早点睡觉
play sports进行体育活动
be good for对……有好处
go camping去野营
not…at all一点儿也不……
in one’s free time在某人的业余时间
the most popular最受欢迎的
such as比如；诸如
old habits die hard积习难改
go to the dentist去看牙医
morn than多于；超过
less than少于
help sb. with sth.帮助某人做某事
How about…? ......怎么样？/ ……好不好？
want sb. to do sth.想让某人做某事
How many+可数名词复数+一般疑问句？ …有多少…?
主语+find+that从句. ……发现……
spend time with sb.和某人一起度过时光
It’s+ adj.+ to do sth. 做某事的……的。
ask sb. about sth.向某人询问某事
by doing sth. 通过做某事
What’s your favorite……?你最喜爱的……是什么？
the best way to do sth.做某事的最好方式
4. 求初二英语下册语法知识要点
我就说说我们这的吧，我刚结束完初二，下学期就奔三啦～
初二下册最在我们这儿，最最主要的就是——从句。分出各种从句类型，但初二下没有深入地学习从句。主要就是这几种：if引导的条件状语从句、原因状语从句、让步、时间、疑问词引导、或者that引导的宾语从句。
简单讲一下吧，首先，宾语从句最最重要的一点就是——从句部分用陈述句语序。（引导词后面的句子就是从句）举个疑问词引导的吧：I don’t know 【what】should I do。【what是引导词】
平时我们问“我应该做什么”肯定这么说：what should I do？ 而在宾语从句中，就要将疑问句语序改为陈述句语序。
【that】引导的宾语从句很简单，that引导的必须是一个陈述句，不能是个疑问句，所以啊，肯定得用陈述句语序喽～
if引导的条件状语从句比前面两种而言较难。【当if解释为“如果”时，句子才是一个条件状语从句，才需要遵守下面的约定：】
if是引导词，if之后的那一句话便是从句，从句部分必须用一般现在时，不管它是要表示将来过去还是现在。如果主句用了（即“ 不是if引导的那一句句子，不是if后的那一句句子，if前的那一句句子便是主句）将来时（will……be going to）那么从句部分必须用一般现在时，不管它是要表示将来还是现在。
例句：（这里的if解释为“如果”）
If he comes I will tell you immediately。 【如果】他来，我会立刻告诉你。
分析：
此句的从句部分便是“he comes ”，因为它在if之后。这里其实要表示一个将来时的，如果他来，并不知道来不来对不？但依旧要用上一般现在是。
I will tell you immediately为主句部分，用了将来时，因为它没有紧接着if。
if也可以表示为：是否。
当if表示为是否时，if部分不一定要用上现在时。
比如：I donnot know if he will come（我不知道他是否会来）
原因状语从句其实很简单，通俗来说，就是because引导的从句喽～用法其实楼主早就应该知道的，只是给他起一个名字而已，也不需要特别注意事态，因为because跟陈述句的吧。。
时间也很简单啊，就是when、while（while后面的句子要用上进行时【现在进行时、过去进行时……】）、 before, after,, as soon as, until, since...... 这里要注意一点的是，如果主句是一般将来时，从句只能用一般现在时表示将来意义。和if条件状语从句差不多用法。
让步么，就是because和so不能用在同一句句子中，有了because就不能有so，so就不能用because，同样的，although（虽然）、but也同样。
另外还有一个很重要的就是——直接引语和间接引语。
这种从句并非由主语直接叙述出来，而是通过第三人转述的。实际上间接引语大都是宾语从句，当直接引语为祈使句，陈述句，疑问句被转换成间接引语时，句子的结构，人称，时态，时间，时间状语和地点状语等都要发生改变。间接引语其实就是我们所说的第三人称转述。
直接引语中的第一人称，一般转换为第三人称，如：
He said，“I am very sorry.” ——>He said that he was very sorry.
直接引语中的第二人称，如果原话是针对转述人说的，转换为第一人称，如：
“You should be more careful next time,” my father told me.——>
My father told me that I should be more careful the next time.
直接引语中的第二人称，如果原话是针对第三人称说的，转换成第三人称。如：
She said to her son, “I'll check your homework tonight.” ——>
She said to her son that she would check his homework that night.
人称的转换包括人称代词、反身代词、物主代词等，如：
He asked me, “Will you go to the station with me to meet a friend of mine this afternoon?” ——>
He asked me whether I would go to the station with him to meet a friend of his that afternoon.
总之，人称的转换不是固定的，具体情况，具体对待。
直接引语改为间接引语时，主句中的谓语动词如果是过去时，从句（即间接引语部分）的谓语动词在时态方面要作相应的变化，变成过去时范畴的各种时态（实际也是宾语从句的时态要求）
指示代词、时间状语, 情态动词、在直接引语变为间接引语时需要的变化：
this —— that these —— those now —— then today —— that day
can —— could may —— might must\ —— had to shall —— should
- -累死我了0 0，间接引语、直接引语的例子是从网络上找的。
5. 八年级下册的英语语法知识有哪些
你是什么版本的教材啊
6. 初二下册英语必知的语法有哪些
您好, 初二下册英语必知的语法有
八年级下册语法和短语
Unit 1 Will people have robots?
重点语法：一般将来时态的应用
do/does 的一般将来时态形式：(shall/will) do
do/does 的一般将来时态的被动语态：(shall/will) be done
一般将来时态的肯定句、否定句、疑问句形式：
肯定句例句：People will have robots in a few years.
否定句例句：People (will not/won't) have robots in a few years.
一般疑问句例句：Will people have robots in a few years?
特殊疑问句例句：What will people have in a few years?
重点短语：won't = will not
they'll = they will
she'll = she will
he'll = he will
I'll = I will
fall in love with(sb./sth.) 爱上（某人/某物）
be able to do sth. 能够做某事
come true 实现
in the future 未来
hundreds of 数以百计的
thousands of 数以千计的
look for(sb./sth.) 寻找（某人/某物）
will → would 情态动词 will 的原形和过去式
may → might 情态动词 may 的原形和过去式
Reading Strategy(阅读方法)
Look at the title and picture, and predict what you will read about. (看着标题和图片，预知你要阅读那些方面的内容。)This helps you get ready to acquire new information. (这样可以帮助你获得一些新的信息。)
Unit 2 What should I do?
重点语法：过去将来时态（将来时态的委婉说法）
do/does 的过去将来时态形式：(should/would) do
do/does 的过去将来时态的被动语态：(should/would) be done
过去将来时态的肯定句、否定句、疑问句形式：
肯定句例句：You should write a letter to him.
否定句例句：You shouldn't write a letter to him.
一般疑问句例句：Should I write a letter to him?
特殊疑问句例句：What should I do?
重点短语：keep sb. out 不让某人进入
What's wrong? = What's the matter? = What's the problem? 怎么了？
out of style 不时髦的；过时的
call sb. up 给某人打电话
pay for sth. 为某事付款
part-time job 兼职工作
the same as = be same (to/with) 与……同样
in style 时髦的；流行的
get on [well] with sb. = get along [well] with sb. 与某人相处（好）
didn't = did not
couldn't = could not
as ... as possible 尽可能……(eg/ as soon as possible 尽快)
all kinds of 各种；许多
on the one hand 一方面
on the other hand 另一方面
ask sb. for sth. = ask sb. to do sth. 请求某人做某事
ask sb. not to do sth. 请求某人不要做某事
spend (money) on sth. = spend (money) [in] doing sth. 花钱做某事
sth. cost sb. (money) 某人花钱为了某事
take sb. sometime to do sth. 花某人时间做某事
find out 查明
find sb. doing sth. 发现某人做某事
be angry with sb. 生某人的气
be angry at sth. 生某事的气
the same age as = as old as 与某人年龄一样
have fight with sb. 与某人打架
learn to do sth. 学会做某事
not ... until ... 直到……才……
compare sth.(A) with sth.(B) 把某事(A)与某事(B)作比较
it's time for sth. = it's time to do sth. 到该做某事的时间了
maybe adv. 或许
may be （情态动词 + 动词原形）可能是
shall → should 情态动词 shall 的原形和过去式
pay → paid → paid 动词 pay 的原形、过去式和过去分词
Reading Strategy(阅读方法)
You will learn to use new words better if you use a learner's dictionary. (时刻学着应用新单词来学习比时刻使用字典这种途径方法更好。)A bilingual dictionary sometimes gives the wrong meaning for the situation you want. (在某些你需要的场合下，一本双语字典有时会给你错误的解释。)
Unit 3 What were you doing when the UFO arrived?
重点语法：过去进行时态
do/does 的过去进行时态形式：(was/were) doing
do/does 的过去进行时态的被动语态：(was/were) being done
过去将来时态的肯定句、否定句和疑问句形式：
肯定句例句：I was walking down the street when a UFO landed.
否定句例句：I wasn't walking down the street when a UFO landed.
一般疑问句例句：Were you walking down the street when a UFO landed?
特殊疑问句例句：What were you doing when a UFO landed?
动词 when 和 while 的选择：when 后加瞬间动词，while 后加延续性动词。
例句：The boy was walking down the street when the UFO landed.
=While the boy was walking down the street, the UFO landed.
感叹句
结构：(1) How + adj. + the + 主语 + 谓语动词
=(2) What + (a/an) + [adj.] + n. + 主语 + 谓语动词
例句：What a beautiful flower [it is]!
=How beautiful the flower is!
What beautiful flowers [they are]!
=How beautiful the flowers are!
重点短语：get out 出去；离开
take off 起飞
run away 逃跑；跑掉
come in 进来
hear about = hear of 听说
take place 发生
as ... as 像……一样(eg/ as old as him 像他一样老)
anywhere = everywhere = here and there 任何地方
think about 考虑
think of 认为
get up = get out of the bed 起床
at the doctor's 在诊所
every day 每一天
everyday adj. 日常的
most adj. 大部分
the most 最多的
in space 在太空中
national hero 民族英雄
all over the world = in the world 全世界
Reading Strategy(阅读方法)
The title can be helpful for you to understand a text. (一篇文章的标题可以帮助你理解整篇文章。)It's also a good idea to read the first sentence of each paragraph before you read. (在阅读整篇文章之前，阅读每段的第一句话也是一个很有效的方法。)
Unit 4 He said I was hard-working.
重点语法：宾语从句
结构：主语 + 谓语动词 + 宾语从句(主语 + 谓语动词 + 宾语/表语)
例句：----I'm good at English. He says. (改为加宾语从句的复合句)
----He says I'm good at English.
注意：①主句是一般现在时态，宾语从句的时态不受其影响。
例句：He says I'm good at English now.
He says I was good at mathematics when I was young.
②主句是过去时态，宾语从句也要用过去时态。
例句：He said I was good at mathematics when I was young yesterday.
He said I was good at English now yesterday.
③宾语从句是客观真理时永远用一般现在时态。
例句：Our teacher says 24 hours make a day.
Our teacher said the sun gives us so many energy yesterday.
④动词原形不能作主语，必须用其 -ing 形式。
例句：She said helping others changed her life.
重点短语：direct speech 直接引语
reported speech = indirect speech 间接引语
first of all = at first 首先
pass on 传递
be supposed to do sth. 应该做某事
be good at = do well in 在某方面做得好
in good health 身体健康
get over 克服
open up 打开
care for = take care of = look after 照料；照顾
not any more = not any longer = no longer 不再
have a cold 感冒
end-of-year exam 年终考试
get nervous 变得紧张
forget to do sth. 忘记做某事（该事未做）
forget doing sth. 忘记做某事（该事已做）
it's + adj. + [for sb.] + to do sth. 做某事[对某人来说]……（加形容词）
context 上下文
Reading Strategy(阅读方法)
First read for meaning, not for detail. (首先理解文段的大致意思，不在于文段的细节部分。)You can understand the meaning of a word you don't know from the context. (至于不懂的单词，你可以通过上下文来寻找它的正确释义。)
Unit 5 If you go to the party, you'll have a great time!
重点语法：if 引导的条件状语从句
结构：主句 + if + 条件状语从句
if + 条件状语从句 + [(comma)] + 主句
注意：在 if 引导的条件状语从句中，主句应用将来时态，状语从句用一般现在时态。
例句：You'll have a great time if you go to the party.
=If you go to the party, you'll have a great time.
重点短语：take away 拿走
around the world = all over the world 在世界各地
make a living 谋生
all the time = always 一直
What's the problem? = What's the matter? = What's wrong? 怎么了？
in order to do sth. 为了做某事
make sb. do sth. 使得某人做某事（to 省略，该结构是一个不带 to 的不定式。）
make sb. adj. 使得某人……（加形容词）
make sb. done 使得某人被做
be famous for 为……而出名
be famous as 作为……而出名
in class 在课堂上
spend ...(time/money) on sth. = spend ...(time/money) in doing sth. 花……（时间/钱）用于做某事
see sb. do sth. 看见某人做某事（强调整个过程）
see sb. doing sth. 看见某人做某事（强调偶然性）
say → said → said 动词 say 的原形、过去式和过去分词
tell → told → told 动词 tell 的原形、过去式和过去分词
eat → ate → eaten 动词 eat 的原形、过去式和过去分词
speak → spoke → spoken 动词 speak 的原形、过去式和过去分词
Unit 6 How long have you been collecting shells?
重点语法：现在完成进行时态
do/does 的现在完成进行时态形式：have/has been doing
do/does 的现在完成进行时态的被动语态：have/has been being done
现在完成进行时态所应用的场合：
①某事从过去发生一直持续到现在都在做
②过去发生的动作对现在造成影响
例：我已上了三年初中。
I have been in Junior School for 3 years.
自从那次他与我谈过心后，我天天都在进步。
I have been making progress since he talked with me that time.
现在完成进行时态的肯定句、否定句和疑问句形式：
肯定句例句：I have been skating for five hours.
否定句例句：I haven't been skating for five hours.
一般疑问句例句：Have you been skating for five hours?
特殊疑问句例句：How long have you been skating?
注意：瞬间动词不能和一段时间连用。
例句：你借这本书已经多长时间了？
How long have you been keeping this book?
重点短语：run out of 用完；用尽
by the way 顺便说说
be interested in doing sth. 对某事感兴趣
more than 比……多
far away 在远处
would like to do sth. = want to do sth. = feel like doing sth. 想要做某事
send sb. sth. = send sth. to sb. 把某物赠送给某人
in fact 实际上
room 房间（用于可数名词）；空间（用于不可数名词）
common → more common → the most common 形容词 common 的原级、比较级和最高级
Reading Strategy(阅读方法)
Let your eyes "scan" the text quickly to find details that you're looking for. (在阅读文章之前，用眼睛“横扫”整篇文章，快速寻找你需要的文章要点。)You can find information quickly without reading the whole text. (这样你就不用细读整篇文章，就能寻找到你需要的一些信息。)
Unit 7 Would you mind turning down the music?
重点语法：mind [one's] doing sth. 介意（某人）做某事
重点短语：not at all 一点也不
turn down 调节使音量变小
right away = in a minute = at once 立刻；马上
wait in line 排队等候
cut in line 插队等候
hasn't = has not
keep ... down 压低声音；使缓和
at first = first of all 首先
take care 当心；小心
take care of = care about = look after 关心；照顾
break the rule 违规
obey the rule 遵守规定
put out 熄灭
pick sth. up 捡起某物
wait for sb. 等候某人
depend on 依赖；依靠
get back = return 要回
mean → meant → meant 动词 mean 的原形、过去式和过去分词
Reading Strategy(阅读方法)
As we read, we need to find "topic sentences".(在我们阅读的时候，我们需要寻找“主题语句”，也就是和文章中心最相关的语句。) These sentences usually gives us a "summary", or overall meaning of each paragraph and help us understand what the paragraph is about.(这些语句通常会给我们一些文章的“概要”，或者每个文段的全部意思，来帮助我们理解段落大意。) After the topic sentence comes more detail and explanation.(当“主题语句”出现后，该段的一些解释和细节也就会随之出现。)
Unit 8 Why don't you get her a scarf?
重点语法：询问别人为什么要做或者不做某事
why don't you do sth. = why not do sth.
例句：Why don't you get her a camera? = Why not get her a camera?
what about = how about
例句：How about some tennis balls? = What about some tennis balls?
重点短语：fall asleep 入睡
give away 赠送；分发
hear of = hear about 听说
take an interest in = be interested in 对……感兴趣
make friends with 与……交友
make progress 取得进步
keep → kept → kept 动词 keep 的原形、过去式和过去分词
feed → fed → fed 动词 feed 的原形、过去式和过去分词
fall → fell → fallen 动词 fall 的原形、过去式和过去分词
hear → heard → heard 动词 hear 的原形、过去式和过去分词
Reading Strategy(阅读方法)
To understand the important ideas from the text, we must "summarize".(为了了解文段最主要的意图，我们必须要进行总结。) Do this by answering "who, what, where, why" questions as you read.(在阅读时，常注意回答时间、地点、人物这些基本要素问题，达到总结的目的。)
Unit 9 Have you ever been to an amusement?
重点语法：现在完成时态
do/does 的现在完成时态形式：(have/has) done
do/does 的现在完成时态的被动语态：(have/has) been done
现在完成时态主要强调过去发生的事情对现在的影响。
例句：我去年去过美国，那是我第一次出国。
I have ever been to America. It's the first time for me to go abroad.
重点短语：have a great time = have a good time = have fun = enjoy oneself 玩得高兴
on board 在船上
end up doing sth. 结束做某事
all year round = all over the year 终年
understand → understood → understood 动词 understand 的原形、过去式和过去分词
Reading Strategy(阅读方法)
After reading, write down three or more things you have learned. (在阅读整篇文章之后，把你学到的三样或更多事物写下来。)We always remember things better if we take time to reflect. (如果我们花时间去思考一些问题的话，那么我们就能更容易地记住一些事情。)
Unit 10 It's a nice day, isn't it?
重点语法：反意疑问句
反意疑问句由肯定陈述句加否定问句构成，或者由否定陈述句加肯定问句构成。
例句：He's a student, isn't he?
She's not his mother, is she?
回答反意疑问句时，要根据事实来回答。若事实是肯定的，则必须用 yes 回答。若事实是否定的，则必须用 no 回答。
例句：你还没有准备好，对吧？
You're not ready, are you?
是的，我没有准备好。
No, I'm not.
不，我准备好了。
Yes, I am.
重点短语：look through 浏览
come along 出现；发生
get along 相处
at least 至少
at most 至多
a thank-you note 感谢信
forget → forgot → forgotten 动词 forget 的原形、过去式和过去分词
little → less → least 形容词 little 的原级、比较级和最高级
many/much → more → most 形容词 many/much 的原级、比较级和最高级
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7. 初二英语语法知识包括哪些语法
情态动词的用法
情态动词用法归纳
情态动词是一种本身有一定的词义,但要与不带to的普通动词的不定式一起使用，给谓语动词增添情态色彩，表示说话人对有关行为或事物的态度和看法，认为其可能、应该或必要等。
情态动词后面加动词原形。
情态动词有can (could), may (might), must, have to, shall (should, will (would), dare (dared), need (needed), ought to等。 情态动词无人称和数的变化；不能单独使用，必须与其后的动词原形构成谓语
一、 can, could
1) 表示能力（体力、知识、技能）。
Can you lift this heavy box?（体力）
Mary can speak three languages.（知识）
Can you skate?（技能）
此时可用be able to代替。Can只有一般现在时和一般过去式；而be able to则有更多的时态。
I’ll not be able to come this afternoon.
当表示“经过努力才得以做成功某事”时应用be able to，不能用Can。如：
He was able to go to the party yesterday evening in spite of the heavy rain.
2) 表示请求和允许。
-----Can I go now?
----- Yes, you can. / No, you can’t.
此时可与may互换。在疑问句中还可用could,
might代替，不是过去式，只是语气更委婉，不能用于肯定句和答语中。
---- Could I come to see you tomorrow?
---- Yes, you can. ( No, I’m afraid not. )
3) 表示客观可能性（客观原因形成的能力）。
They’ve changed the timetable, so we can go by bus instead.
This hall can hold 500 people at least.
4) 表示推测（惊讶、怀疑、不相信的态度），用于疑问句、否定句和感叹句中。
Can this be true?
This can’t be done by him.
How can this be true?
二、 may, might
1) 表示请求和允许。might比 may语气更委婉，而不是过去式。否定回答时可用can’t
或mustn’t，表示“不可以，禁止”。
----Might/ May I smoke in this room?
---- No, you mustn’t.
---- May/Might I take this book out of the room?
---- Yes, you can. (No, you can’t / mustn’t. )
用May I...？征徇对方许可时比较正式和客气，而用Can I...？在口语中更常见。
2）用于祈使句，表示祝愿。
May you succeed!
3) 表示推测、可能性（不用于疑问句）。
might不是过去式，它所表示的可能性比may小。
1．He may /might be very busy now.
2．Your mother may /might not know the truth.
三、 must, have to
1) 表示必须、必要。
You must come in time.
在回答引出的问句时，如果是否定的，不能用mustn’t（禁止，不准），而用needn’t, don’t have to（不必）.
---- Must we hand in our exercise books today?
---- Yes, you must.
---- No, you don’t have to / you needn’t.
2) must是说话人的主观看法， 而have to则强调客观需要。Must只有一般现在时， have to 有更多的时态形式。
1． he play isn’t interesting, I really must go now.
2． I had to work when I was your age.
3) 表示推测、可能性（只用于肯定的陈述句）
1． You’re Tom’s good friend, so you must know what he likes best.
2． Your mother must be waiting for you now.
四、 dare, need
1) dare作情态动词用时, 常用于疑问句、否定句和条件从句中, 过去式形式为dared。
1． How dare you say I’m unfair?
2． He daren’t speak English before such a crowd, dare he?
3． If we dared not go there that day， we couldn’t get the beautiful flowers.
2) need 作情态动词用时, 常用于疑问句、否定句。在肯定句中一般用must, have to, ought to, should代替。
1．You needn’t come so early.
2. ---- Need I finish the work today?
---- Yes, you must. / No, you needn’t.
3) dare和 need作实义动词用时， 有人称、时态和数的变化。在肯定句中，dare后面常接带to的不定式。在疑问句和否定句中，dare后面可接带to或不带to的不定式。而need后面只能接带to的不定式。
1. I dare to swim across this river.
2. He doesn’t dare (to) answer.
3. He needs to finish his homework today.
五、 shall, should
1) shall 用于第一人称，征求对方的意见。
What shall we do this evening?
2) shall 用于第二、三人称，表示说话人给对方的命令、警告、允诺或威胁。
1. You shall fail if you don’t work hard.(警告)
2. He shall have the book when I finish it.(允诺)
3. He shall be punished.(威胁)
六、 will, would
1) 表示请求、建议等，would更委婉。
Will / Would you pass me the ball, please?
2) 表示意志、愿望和决心。
1. I will never do that again.
2. They asked him if he would go abroad.
3) would表示过去反复发生的动作或某种倾向。would表示过去习惯时比used to正式，且没有“现已无此习惯”的含义。
1. During the vacation, he would visit me every other day.
2. The wound would not heal.
4) 表示估计和猜想。
It would be about ten o’clock when she left home.
七、 should, ought to
1) should, ought to表示“应该”，ought to表示义务或责任，比should语气重。
1. I should help her because she is in trouble.
2. You ought to take care of the baby.
2) 表示劝告、建议和命令。should, ought to可通用，但在疑问句中常用should。
1. You should / ought to go to class right away.
2. Should I open the window?
3) 表示推测
should , ought to (客观推测), must(主观推测)。
1.He must be home by now. (断定他已到家)
2.He ought to/should be home by now.(不太肯定)
3. This is where the oil must be.(直爽)
4. This is where the oil ought to/should be.(含蓄)