1.6 进行时态

第六节 进 行 时 态

一、现在进行时表示现在或现阶段进行的动作，但也和always, constantly, forever等频度副词连用表示一个经常进行的动作或现在存在的状态

1. Because of ［A］ the effects of tidal friction(摩擦力)， the earth's rotation， which forms ［B］ the basis for time units， is ［C］ gradually slow down ［D］ .
2. All things ［A］ consist of ［B］ atoms or molecules，which be ［C］ constantly moving ［D］ .

二、瞬间动词和一些表示状态及感觉的动词一般不用进行时，而用一般现在时或一般过去时代替。这些动词包括：appear(显然), arrive, be, come, desire, go, find, hate, hope, join, know, leave, like, love, join, possess, start, sail, see, suggest, taste, think(认为), understand等，类似的动词还有belong to， consist of，seem(似乎)等

3. He was seeing ［A］ somebody creeping ［B］ into the house through ［C］ the open ［D］ window last night.
4. Among ［A］ the most important ［B］ jazz innovators ［C］ in the twentieth century are being ［D］ Louis Armstrong， Fletcher Henderson， Duke Ellington， and Dizzy Gillespie.

三、过去完成进行时

过去完成进行时表示到过去的某一时间点或某一时间段里一直在进行的动作或行为

5. They received the parcel that they _____ for a long time.
   ［A］ expected
   ［B］ have expected
   ［C］ had been expecting
   ［D］ had expected
   There is a wellknown incident in one of Moliere′s plays, where the author makes the hero express unbounded delight on being told that he had been talking prose during the whole of his life.(93年翻译)

四、例题解析

1. D错。slow只有作为不及物动词用时才与up或down连用，表示"慢慢向上"或"慢慢向下"。所以我们说，这里的slow是动词而不是形容词，应将动词slow后边加上"ing"，改为(is) slowing down，构成现在进行时。
2. C错，改为are。
3. A错，改为saw。
4. D错，改为are。
5. C为正确答案。