7.7 不定式作状语 1）目的状语 To… only to (仅仅为了), in order to, so as to, so(such)… as to… (如此……以便……) He ran so fast as to catch the first bus. 他飞快地跑以便赶上第一班车。 I come here only to say good-bye to you. 我来…...

7.2 不定式作补语 1) 动词+宾语+不定式(to do)advise allow appoint believe cause challenge command compel consider declare drive enable encourage find forbid force guess hire imagine impel induce in…...

7.14 不定式的时态和语态 时态\语态 主动 被动一般式 to do to be done进行式 to be doing 完成式 to have done to have been done完成进行式 to have been doing 1) 现在时：一般现在时表示的动词，有时与谓语动词…...

7.9 省to 的动词不定式 1） 情态动词 ( 除ought 外，ought to)： 2） 使役动词 let, have, make： 3） 感官动词 see, watch, look at, notice...

7.4 It's for sb.和 It's of sb. 1）for sb. 常用于表示事物的特征特点，表示客观形式的形容词，如easy, hard, difficult, interesting, impossible等： It's very hard for him to study two languages. 对他来说学两门外语是很难的。 2）of sb的句…...

7.11 不定式的特殊句型too…to… 1）too…to 太…以至于… He is too excited to speak. 他太激动了，说不出话来。 ---- Can I help you ? 需要我帮忙吗? ---- Well, I'm afraid the box is too heavy for you to carry it, but thank you all…...

7.6 不定式作定语 不定式做定语通常要放在被修饰的词后。例如： I have a lot of work to do. So he made some candles to give light. ...

7.1 不定式作宾语 1) 动词+ 不定式 afford aim appear agree arrange ask be decide bother care choose come dare demand desire determine expect elect endeavor hope fail happen help hesitate learn …...