Unit 1 Grammar and usage 课件- 高一下学期英语牛津译林版（2020）选择性必修第一册.ppt

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1、Non-finite verb,GRAMMAR,动词不定式?,1. 动词不定式是动词的一种非谓语形式，不能在句中单独作谓语。2. 动词不定式具有动词的性质，它可以有自己的宾语和状语，从而构成动词不定式短语。3. 动词不定式也具有非动词的性质，相当于一个名词、形容词或副词,可以在句中担任主语、宾语、宾语补足语、表语、定语和状语。4. 动词不定式有形式的变化，即一般式、进行式、完成式和被动式。,To do,As a real foodie, I enjoy all kinds of foods. My dream is to try different restaurants and taste

2、various foods.Yesterday I invited some friends to try a great new restaurant for dinner.Nothing can stop our determination to have a try. We decided to wait outside.After an hour of waiting, we were invited to go into the restaurant and take the order.The dishes are extremely delicious. It is worthw

3、hile to have such a long wait.,Lead-in,Find out to-infinitives and guess their functions.,表,宾,主,补,补,01,used as subject,(1)To see is to believe.(2) 你错过这次比赛太遗憾了。It is a pity for you to have missed this game 我花了3小时完成作业。It took me three hours to finish the homework. It is kind of you to give your seat t

4、o the elderly. It is appropriate for you to give seats to the elderly. 三个小时内完成作业似乎是不可能的。It seems impossible to finish the homework in three hours.,it + is + 名词 + to do; pity, shame, pleasure, ones duty, ones job, fun, joy, good manners, bad manners,It takes/costs sb + some time + to do,It + be + adj

5、.+ for sb + to doIt + be +adj. + of sb + to do,It seems (appears) +形容词+ to do,(1). Its bad for your eyes computer games too much.A. playsB. to playC. playD. playing,B,01,used as predicative,我的梦想是成为一名医生。 My dream is to be a doctor. 他们应该被责备。 They are to blame.,动词不定式做表语，一般用于be或seem等系表动词后面。主语通常是wish, id

6、ea, work, task, job, aim等词。,To-infinitive 的变化,1.To-infinitive否定形式是“not to 动词原形”The teacher asked us so much noise.A. dont makeB. not makeC. not makingD. not to make,D,To-infinitive 的变化,2. To-infinitive被动形式”To be done”It was a great honour to (invite) here today. The festival is to (hold) next Friday

7、.,to be invited,to be held,To-infinitive 的变化,3.单个不定式做主语，谓语动词用单数To play basketball (be) great.如果and连接两个或更多并列的不定式作主语，谓语动词就用复数To improve peoples life and to speed up socialist construction (be) our two important tasks.,is,are,04,Conclusion,一个句子中已经存在一个_, 又没有_的情况下，另一个动词需要用_。He often works hard to earn mo

8、re money. The meeting is to be held next week. 动词不定式to do 在句中通常表示:_和_。,谓语动词,连词,非谓语动词,目的,将来,to do,to be done,to be doing,同时发生,之后,同时发生,to have done,to have been done,之前,to have been doing,之前,not to,Rewrite the following sentences using to-infinitives according to the requirements in the brackets.,1. T

9、he next dish that the cook will prepare is Kung Pao Chicken. (attributive)2. The preparation of home-cooked meals is easy and enjoyable. (subject)3. Her dream is that she will open a restaurant some day. (predicative),The next dish to be prepared by the cook is Kung Pao Chicken.,To prepare home-cook

10、ed meals is easy and enjoyable./It is easy and enjoyable to prepare home-cooked meals.,Her dream is to open a restaurant some day.,B Applying the rules,4. We will put the potatoes in the pot first in order that they will be cooked quickly.（adverbial of purpose)5. I consider the Soup of the Day as th

11、e best option on the menu. (object complement),We will put the potatoes in the pot first (in order) to cook them quickly.,I consider the Soup of the Day to be the best option on the menu.,B Applying the rules,Located,to see,to turn,to sit,painted,ranging,to invite,to be,B Applying the rules,THE,END.,