非谓语动词课件讲述.ppt

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非谓语动词课件讲述

Non-finite Verbs Non-finite verbs Gerund Participle Present Participle Past Participle Infinitive Tense and Voice of Infinitive active voice passive voice 一般式 to do to be done 进行式 to be doing 完成式 to have done to have been done 完成进行式 to have been doing (1).They pretended not to see us. (2). He pretended to be sleeping. (3).She pretended to have known it before. (一般式表示与谓语的动作同时/发生在它之后.) (在谓语动词发生的同时,不定式的动作也正在进行) (完成式表示动作发生在谓语动作之前) (4).The boy is said to have been playing the piano since he was three years old. (完成进行式表示在谓语动词的动作之前一直进行的动作) Exercises: 1. The policemen asked their identities ___ (keep) secret. 2.Ben is the only person in his town ___ (see) the UFO. 3.The visitors are requested ___ (not, touch) the exhibits. 4. The old temple is said ___ (destroy) in a fire one hundred years ago. to be kept to have seen to have been destroyed not to touch What function does the infinitive act in the following sentences? 1、The?infinitive?as?subject To run is a good habit.(=It is a good habit to run.) 2、The?infinitive?as?predicative Our plan is to build a bridge over the river. 3、The?infinitive?as?object I want to buy a dictionary. 4、 The?infinitive?as?attributive He has a chance to go abroad. 5、The?infinitive?as?adverbial To finish the work, he had to get up early. 6、The?infinitive?as?object complement I ask her to help him. (1). 主语 Subject 不定式作主语时,往往放在句子的后部,用it作形式主语. To get enough sleep at night is important. It____________________________________. It is adj. (for/of sb) to do sth. It is + a pleasure/an honor/a pity to do. It takes sb +time to do. is important to get enough sleep at night The usage of infinitive 1. 你太好了给我一些帮助。 It is very kind of you to give me some help. 2.和你一起共进晚餐很愉快。 It is a pleasure to have dinner with you. It only took two years to complete the project. 3.完成这项工程只花了二年时间。 巩固练习1 (2). 表语 Predicative My job is Your task ___

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