【正文】 , fail ,wish/hope /expectdemand,offer , learn , manage , pretend ,后跟不定式做賓語的動詞 afford , agree/refuseIt is easy/difficult/right/wrong/important/necessary/essencial(for sb)to do sth.It is a pleasure/pity/honor (for sb )to do sthIt takes /costs/requires +n.(for sb)to do sthNothing is more + to do sth.2標簽: 中學英語例如：　　　I have a lot of work to do.　　　　So he made some candles to give light 主題：不定式做主語，表語，賓語的固定搭配收藏本貼 | 好友分享 | 推廣拿分點擊:986　　　It seemed selfish of him not to give them anything.　他不給他們任何東西，這顯得太自私了。s necessary for you to lock the car when you do not use it.　當你不用車的時候，鎖車是有必要的。s easy (for me) to do easy,　difficult,　 hard,　 important,　 possible,　 impossible,　fortable,　 necessary,　 better。(經(jīng)驗)Driving a car during the rush hour is tiring．在高峰時刻開車令人厭煩。(抽象)It is not very good for you to smoke so much．你抽這么多煙對你身體很不好。time It’sgooddo.brave)rude,(good,to(important,andiscussisinformations time to do sth 做……事的時間到了（=It39。ll try. 另外,be going to, ought to, used to等也常用于這一結構中. ⒌在why引起的問句中,省略to.如: Why spend such a lot of money Why not wait for a couple of days ⒍當兩個或更多作用相同的不定式并列使用時,只在第一個不定式前加to.如: It39。d love to. ③Don39。m sorry to have kept you waiting. We are too young to have seen the old society. ③進行式:: The teacher happened to be correcting our papers when I came in. They seemed to be discussing something important. (2)語態(tài) 如果動詞不定式的邏輯主語是這個不定式所表示的動作的承受者,: It39。m not such a stupid fool as to put it in writing. ②enough…to The speed is high enough for us to catch up with the first liner. ③only to Jane hurried back only to find her mother dying in the hospital. ④too…to I39。t hear anyone say anything about it. ②They make the students do too much homework every day. 這種句式在變?yōu)楸粍诱Z態(tài)時,to不能省略,如第②句:The students are made to do too much homework every day. (4)help, know后面的to: Would you please help me(to) fill in the tax form I39。s time to leave off talking and to start acting. They left off to go fishing. 三,做表語 不定式作表語表示具體動作或將來動作。t help doing 禁不住…… to do不能幫助干…… They couldn39。t permit our swimming in the lake. Our teachers don39。t know the rules. 二,作賓語 ⒈不定式作賓語 ①以下動詞后,:agree, ask, aim, arrange, choose, decide, demand, expect, fail , help, hope, lean, long, manage, offer, plan, prepare, pretend, promise, refuse, wish等,: I decided to ask for my money back. I decided that I would ask for my money back. When our visit to the farm was over, we expected to start back on foot. When our visit to the farm was over, we expected that we would start back on foot. ②當復合賓語中的賓語是不定式時,先用形式賓語it代替不定式,把不定式置于補語之后,即:主語+動 詞+it+補語+to : We think it quite important for us to learn a foreign language well. He feels it his duty to help the poor. ③介詞but, except, besides +to do(do) 在這種句型中,如介詞前有動詞do,后面應接不帶to的不定式。而動名詞作主語經(jīng)常表示抽象動 作,: It39。s+形容詞+doing It39。s kind of you to help me with my English.=You are kind to help me with my English. ⒉動名詞作主語 Learning without practice is no good. 動名詞作主語時,: ①It39。動詞不定式和動名詞的句法功能比較 一,作主語 ⒈不定式作主語 動詞不定式作主語時,句子的謂語動詞常用單數(shù),其位置有以下兩種: (1): To get there by bike will take us half an hour. (2)用it作形式主語,把真正的主語不定式置于句后