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人教版高中英语选修7 Unit1 Grammar 精品课件_图文

Unit 1 Grammar Revise the Infinitive Do you believe I can fly like a bird? How can you believe I can fly like a bird? ? _T_o__s_e_e_ is to believe. ? It’s impossible for humans _t_o_f_ly__li_k_e_a__b_ir_d___ now. Marty says… 1. Unfortunately, the doctors don’t know how to make me better, but I am very outgoing and have learned to adapt to my disability. 2. I used to climb trees, swim and play football. 3. Then I started to get weaker and weaker. Marty says… 4. Even after all that, no one could give my disease a name and it is difficult to know what the future holds. 5. Sometimes, too, I was too weak to go to school so my education suffered. 6. My ambition is to work for a firm that develops computer software when I grow up. Marty says… 7. Last year I invented…and a big company has decided to buy it from me. 8. I also have to do a lot of work, especially if I have been away for a while. 9. Just accept them for who they are, and give them encouragement to live as rich and full a life as you do. 不定式 不定式由“to+动词原形”构成,其否定形 式是“not/never to do”,不定式可以带宾语 或状语构成不定式短语,没有人称和数的 变化,但有时态和语态的变化。不定式可 以作主语、宾语、状语、表语和定语,但 不能单独作谓语。不定式的逻辑主语有时 用“for+名词或代词宾格”构成。 动词不定式的作用 Functions of Infinitive 1 主语 (subject) 2 表语 (predicative) 3 宾语 (object) 4 宾补 (object complement) 5 定语 (attribute) 6 状语 (adverbial) 7 独立结构 (absolute construction) 1 不定式作主语 (subject) To keep smiling is healthy for you. It’s important to look up the new words in the dictionary when you study English. 单个不定式作主语时,谓语动词用单数。 若不定式太长,往往用it作形式主语,不 定式后置。 2 不定式作表语 (predicative) ? My job is to protect the world. ? Your task is to _____________. 不定式常用在系动词 be, seem, appear, get, remain等后作表语。 Seeing is to believe. × To see is believing. × Seeing is believing. √ To see is to believe. √ All you have to do is (to) finish the job quickly. 如果主语部分有个表示不定式内容的do, 用作表语的不定式可省略to。 3 不定式作宾语 (object) ? Yao Ming likes to play basketball. ? I find it still necessary (for him) to _________ if he wants to win. 句型:think/ consider/ find it + adj.+ to do 常接动词不定式作宾语的动词有: agree, afford, appear, ask, attempt, care, choose, claim, dare, decide, demand, deserve, determine, expect, fail, get, hate, hesitate, hope, hurry, intend, learn, manage, offer, plan, prepare, pretend, promise, refuse, seem, tend, threaten, want, wish。 4 不定式作宾补 (object complement) My mum asks me to play the piano two hours every day. 引导不定式作宾补的动词: warn, tell, allow, help, ask, force等 +sb to do sth The teacher told me to clean the blackboard. I expect you to gi

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