山东省阳信一中高三英语语法专项复习 动词不定式 2课件VIP免费

动词不定式动词不定式一、不定式结构作主语一、不定式结构作主语 To see one timeTo see one time is better than to hear a hundred timesto hear a hundred times. To persevereTo persevere means victory! 注①：注①：在很多情况下，特别是在口语中，常采用先行 it 代替主语，而把不定式后置： It’s a great pleasure to be hereto be here. It is not an easy thing to master a languageto master a language. 注②：注②：这种后置不定式的结构也适用于某些谓语动词不是系动词的句子，如： It took us five hours to get thereto get there. It made us very angry to hear him talk like thatto hear him talk like that.注③：注③：不定式结构的逻辑主语通常可在特定的上下文或情景中看出，也可以由“ for + 名词词组” 来表示，如： It is not hard for onefor one to do a bit of good. It was difficult for mefor me to do the work.注④：注④：某些形容词在上述结构中作表语时，常在不定式之前加上 “ of + 名词词组” 来说明不定式所指的是谁的情况，如： It’s kind of youof you to think so much of us. It’s very nice of youof you to be so considerate. It’s unwise of themof them to turn down the proposal. It was careless of herof her to make such a mistake. 二、不定式结构作表语二、不定式结构作表语1 ．主语和表语都是不定式（其含义往往一是条件，一是结果），如： To be kind to the enemy is to be cruel to the people. To do that would be to cut the foot to fit the shoe.2 ． 主 语 是 以 aim, duty, hope, idea, intention, mistake, plan, proposal, job, suggestion 等为中心词的名词词组，或以 what 引导的名词性从句表示，后面的不定式说明其内容，如： My idea is to climb the mountain from the northto climb the mountain from the north. Your mistake was not to write that letternot to write that letter. My suggestion is to start work at onceto start work at once. What I would suggest is to start work at...