1：非谓语做主语.doc

PAGE 4 非谓语动词作主语 (谓语动词用单数) 1．动词不定式在句中做主语： 1) To see is to believe. 2) To save time is to lengthen life. 3) To live is to work. 4) To get up early today is unwise. 5) To be invited to your home is my great honor. 2)不定式作主语时，可采用it作形式主语，而把真正的主语不定式后置。 EG: Its a great honor to be invited to Marys birthday party. It was impossible for lost time to be made up. Its our duty to take good care of the old. 固定句型： 1. It＋be＋形容词＋ for sb＋to do . 2. It＋be＋形容词＋ of sb＋to do . EX: 用of 或for填空 1) It is difficult ______us to finish writing the composition in an hour. 2) It’s necessary ____you to lock the car when you do not use it. 3) It’s very kind ______ you to help us. 4) It is stupid _____you to write down everything the teacher says. 5) It was silly _____us to believe him. 3) 疑问词who, what ,which ,when, where, whether ,how等后可接不定式,构成不定式短语在句中作主语 1）When to leave for London has not been decided yet. 什么时间动身去伦敦还没决定。 2）How to get there hasnt been decided. 还没决定怎么到那里。 3）Where to hold the meeting is not a simple question . 4）What to buy is still unknown . 5）How to reach Mount Tai is more difficult . 6）Which to buy is up to you . 7) Whether to hold the party depends on the weather . 2. 动名词在句中作主语： （主动式：doing , one’s doing） （被动式：being done , one’s being done） 1) 动名词作主语和不定式作主语常可互换。二者也有区别：动名词作主语时，常表经常性，习惯性的动作和行为。而不定式作主语的动作意义较强，多指要是去做某事，这种动作往往是要发生的一次性动作,比较具体. EG: 1) Seeing is believing. Walking is a form of exercising. Fighting broke out between the South and the North. 南方与北方开战了。 2) Cheating on an exam ruins ones character. Talking to him is talking to a wall . Reading English aloud in the morning will do you a lot of good. Praising others is a good habit . 3) And being praised by others makes us proud and excited. 4）Punishing students cann’t bring me happiness,but being punished can really make me feel down . 5）Being relaxed makes it easier for us to store and remember new knowledge. Being happy is a wise choice. Being confident does a great deal of good to your li