2012年04月17日 02時04分，《英語網(wǎng):2012小升初英語語法知識要點：動詞不定式(三)》由出國留學(xué)網(wǎng)liuxue86.com英語編輯整理.
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不定式的特殊句型so as to
1) 表示目的；它的否定式是so as not to do。
Tom kept quiet about the accident so as not to lose his job.湯姆對事故保持沉默是為了不丟掉他的工作。
Go in quietly so as not to wake the baby. 輕點進(jìn)去，別驚醒了嬰兒。
2) so kind as to ---勞駕
Would you be so kind as to tell me the time? 勞駕，現(xiàn)在幾點了。
不定式的特殊句型Why not
"Why not +動詞原形"表達(dá)向某人提出建議，翻譯為："為什么不……?" "干嗎不……?"
例如：Why not take a holiday?干嗎不去度假？
不定式的時態(tài)和語態(tài)
時態(tài)語態(tài)主動被動一般式to doto be done進(jìn)行式to be doing完成式to have doneto have been done完成進(jìn)行式to have been doing
：
不定式的特殊句型so as to
1) 表示目的；它的否定式是so as not to do。
Tom kept quiet about the accident so as not to lose his job.湯姆對事故保持沉默是為了不丟掉他的工作。
Go in quietly so as not to wake the baby. 輕點進(jìn)去，別驚醒了嬰兒。
2) so kind as to ---勞駕
Would you be so kind as to tell me the time? 勞駕，現(xiàn)在幾點了。
不定式的特殊句型Why not
"Why not +動詞原形"表達(dá)向某人提出建議，翻譯為："為什么不……?" "干嗎不……?"
例如：Why not take a holiday?干嗎不去度假？
不定式的時態(tài)和語態(tài)
時態(tài)語態(tài)主動被動一般式to doto be done進(jìn)行式to be doing完成式to have doneto have been done完成進(jìn)行式to have been doing