八年级英语下册-Unit-1-Helping-those-in-need-grammar课件-(新版)牛津深圳版.ppt

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1、（1 1）基本形式：）基本形式： to+动词原形动词原形 （在某些情况下可以不带（在某些情况下可以不带 to） （2 2）特点）特点 ： C . 有时态和语态的变化有时态和语态的变化（被动语态的形式为（被动语态的形式为 to be + 动词过去动词过去分词）分词）B . 可以有自己的宾语和状语可以有自己的宾语和状语 动词不定式动词不定式 To learn a foreign language is not easy . It is good others. 帮助他人是件好事。 It is exciting the Internet. 上网是件令人兴奋的事。 = Its not easy to

2、learn a foreign language.动词不定式用法动词不定式用法B、作表语、作表语to clean the classroom 动词不定式动词不定式C 作宾语作宾语 动词动词 + to do常见动词有常见动词有 choose , hope , offer , want , decide, learn , plan, wish, agree, fail等等1. He decided (buy) the camera.to buy 2. I want (listen to) some music after class.to listen to 3. I hope (travel)

3、all over the world one day.to travel动词不定式动词不定式2) 动词动词+疑问词疑问词 + to do 动词不定式动词不定式3) 动词动词 + it(形式宾语）形式宾语）+宾补宾补 +to doI find it important to learn English我发现很难和他好好相处.我发现在炎热的夏天很容易入睡动词不定式动词不定式1) 动词动词 + 宾语宾语 +to do Li Mei asked me to show her the new dictionary .注：有以上结构的常用动词有注：有以上结构的常用动词有 tell. wish, ask,

4、want like, beg, invite,warn, allow,encourage,advise 等。等。2) 动词动词 + 宾语宾语 + do(不带不带 to 的不定式的不定式)注：常用的动词是注：常用的动词是:感官动词感官动词see, hear, feel, watch, notice； 使役动词使役动词 have ,make, let.动词不定式做宾补动词不定式做宾补 E、作状语、作状语可以表目的、表结果、表原因可以表目的、表结果、表原因F、作定语、作定语（必须后置）（必须后置）I came here ( 告诉你一个好消息)to tell you a good newsWe hav

5、e a lot of homework to do every day.I have a good news to tell you.我们每天有很多作业要做.我有个好消息要告诉你.动词不定式动词不定式 not + to do动词不定式的否定形式动词不定式的否定形式5.Im thirsty. Would you please give me something _. A .drunk B .to drink C .to be drunk D .for drinking6.Tom is the first _ to school. A . get B . to get C. getting D .

6、 Got7. The boy wanted to ride his bicycle in the street, but his mother told him _. A. not to B. not to do C. not do it D. do not to 8. I saw him _ out of the room. A. go B. had gone C. has gone D. goes 9.-_ more about tomorrows weather, call 121. -OK, I will. Thank you. A. Know B. Knowing C. To know D. Known10.We must do everything we can _ waste water from running into rivers. A. keep B. kept C. to keep D. keeping11.Lets _ play in the street. Father tells me _ do so. A. not to；not to B. not；not to C. dont；to not D. not to；dont