1) 一般形式:He decided to work harder in order to catch up with the others.
被动形式: He preferred to be assigned some heavier work to do.
语法功能: 表示与谓语动词同步发生
2) 完成形式:He pretended not to have seen me.
被动形式:The book is said to have been translated into many languages.
语法功能:表示发生在谓语动词之前
二)不定式常考的考点:
1)不定式做定语----将要发生
2)不定式做状语----目的
3)不定式充当名词功能---To see is to believe.
三)不定式的省略
1)感官动词 see, watch, observe, notice, look at, hear, listen to, smell, taste, feel
+ do 表示动作的完整性,真实性;
+ doing 表示动作的连续性,进行性
I saw him work in the garden yesterday.
昨天我看见他在花园里干活了。
I saw him working in the garden yesterday.
昨天我见他正在花园里干活。
v 感官动词后面接形容词而不是副词:The cake tastes good; It feels comfortable.
2) 使役动词 have bid make let 等词后不定式要省略但同1)一样被动以后要还原to
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