大学英语六级语法知识动词不定式的否定式

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英语知识：动词不定式的否定式 Tell him not to shut the window She pretended not to see me when I passed by. 我走过的时候，她假装没看见。

典型例题

1)Tell him ___ the window. A. to shut not B. not to shut C. to not shut D. not shut 答案：B。 tell s b to do sth 的否定形式为tell s b not to do sth.

2)She pretended ___ me when I passed by. A.not to see B. not seeingC. to not see D.having not seen 答案：A。 pretend 后应接不定式。其否定形式为pretend not to do sth.。

3)Mrs. Smith warned her daughter ___ after drinking. A. never to drive B. to never driver C. never driving D. never drive 答案：A。warn s b to do sth. 的否定形式为warn s b not to do sth. 此处用的是否定词never.

4) The boy wanted to ride his bicycle in the street，but his mother told him ____. A. not toB. not to doC. not do it D. do not to 答案：A。not to 为not to do it 的省略形式。可以只用to这个词，而不必重复整个不定式词组。及物动词do后应有名词、代词等，否则不对，所以B，D不对。

5) The patient was warned ___ oily food after the operation. A. to eat no B. eating not C. not to eat D. not eating 答案：C。warn一词要求后用不定式，此处为不定式的被动，否定形式为be warned not to do。