1.下列动词或动词短语后接不定式:agree, seem, appear, offer, happen, wish, hope, pay,
expect, long, plan, intend, promise, pretend, decide, afford, manage, choose, be said to,
would like to等。
2. 不定式常用的句型:too…to do (太……而不能), …enough to do…(够……就能
……), so as to do/in order to do(为了……),so…as to do/such…as to do(如
此……结果……)。
3. 不定式的三个结构:即否定结构、复合结构和疑问结构。
否定结构为“not (never) to do”;疑问结构是特殊疑问词“how (what, which, who, whether…) to do”;复合结构是“for/ of +名词(或代词宾格)+ to do ”。
4. let/ make/ have/ see/ hear/ notice/ observe/ listen to/ look at/ watch/feel
这些动词带不定式作宾补时,省掉to, 若这些动词以被动形式出现时,应加上to。
5. 当前面是the first, the second, the last, need, plan, time, chance, right,determination,
ability, opportunity(机会),way时,一般用不定式作定语。
6. but/ except + to do/ do 结构,要根据谓语动词来确定其后面的形式。当谓语动词是do,
does, did时,but后用动词原形;谓语动词是其他动词时,but后用“to + 动词原形”的形式。
7. 形容词后一般用不定式(除busy, worth 两个外)。
You are sure to succeed. 你一定能成功。
He is busy preparing his lessons at present. 他现在正忙于预习功课。
8. 不定式作定语和表语时,有时需要在后面放上一个适当的介词。
This is a bench to sit on.(这是用来坐的凳子。)
This room is comfortable to live in. (这个房间住起来很舒适。)
9. 在“主语+系动词+adj.+不定式”这个句型中,当主语是不定式的逻辑宾语时,不定式不用被动,不能在动词后再放宾语。
The question is easy to answer. (question是answer的宾语,不能说:The question is easy to be answered. 也不能说:The question is easy to answer it .)