四、 不定式作定语
(一)不定式作定语修饰名词或代词，它只能放在它所修饰的名词或代词后面。这时被修饰的名词与不定式之间有逻辑上的主谓关系
- The flexibility of film allows the artist _____ unstrained imagination to the animation of cartoon characters.
［A］ to bring
［B］ bringing
［C］ is brought
［D］ brings - Billie Holiday's reputation as a great jazzblues singer rests on her ability _____ emotional depth to her songs.
［A］ be giving
［B］ are given
［C］ being given
［D］ to give另外，有些词的不定式定语有主谓关系，如除了上述例句以外，还有些词常跟不定式作定语。这些词主要有decision (to make), (a) need (to eat), opportunity (to speak),reason(to learn a foreing language), time (to sth)等。
(二)动词不定式作定语往往有一层动宾关系，即所修饰的名词是不定式的宾语
- Alice was having ［A］ trouble to control ［B］ the children because there were ［C］ so many ［D］ of them.
- There are so many reference books for matriculation of postgraduate and I haven't decided which book _____ .
［A］ to buy
［B］ buy
［C］to be buying
［D］ buying - Astronauts can be affected by loneliness for they have to sit in the spacecraft for weeks with very little _____ and no one _____ .
［A］ to do ... to talk
［B］ doing ... to talk to
［C］ to do ... to talk to
［D］ doing... to talk
(三) 因为不定式所修饰的名词是不定式的宾语，所以如果不定式动词是不及物动词，那么就要在动词后加上相应的介词
- Although the lecture had already been on for five minutes, I still was not able to find a chair _____ .
［A］ to sit
［B］ for to sit on
［C］ to sit on
［D］ for sitting
He has a lot of trifles to deal with./ I had got no place to live in./That girl has nothing to worry about./the subject to concentrate on. / He has a strict teacher to listen to. / She has four children to look after. / She had a sick mother to live with. / This is the very person to sell your ticket to.
(四)一些表示企图、努力、倾向、目的、愿望、打算、能力、意向等意义的名词后面要求接不定式作其定语，如：ability, attempt, effort等
- During ［A］ the 19th century scientists found ［B］ that when certain parts of the brain were damaged ［C］ men lost the ability doing ［D］ certain things.
- What is new, however, is the scientific attempt _____ whether other planets beyond our own have given birth to advanced civilizations.
［A］ discover
［B］ discovers
［C］ discovering
［D］ to discover - Surely her daughter would make an even bigger effort _____ her?
［A］ please
［B］ pleased
［C］ to please
［D］ having pleased