2018高中英语教版选修6课件：Unit 3A healthy life 3.3.pptx

Section Ⅲ— Grammar;一;一;一;一;it的用法(1) 一、用于指代人以外的一切生物、无生命的东西和事情 1.指动物和植物。 ①Oh,it’s Lucy’s cat. ②—Where’s tea grown? —It’s grown in the southeast of China. 2.指代一些无生命的东西。 ③Is it your watch? 3.代替上文提到过的整个事情。 ④You mustn’t play on the road.It’s dangerous.;二、用于指代人 1.指代说话者心目中不太清楚的那个人,常在打电话或敲门时用。 ①—Who is knocking at the door? —It’s me. 2.指代性别不详的婴幼儿或在不计较性别时,也可用it来指人。 ②The child smiled when it saw its mother. ③I don’t know who it is. 3.在回答用指示代词表示人的特殊问句时,常用it指人。 ④Who’s that?Is it Kate?;三、用于指时间、距离、价值、度量和自然现象等 1.表示时间。 ①—What time is it? —It’s ten. ②It’s summer in Australia now. 2.表示距离。 ③—Where’s the farm,Li Lei?Is it far? —No,it’s quite near. 3.表示自然现象。 ④Sometimes it snows and the land is all white.;四、用作形式主语,真正的主语(不定式、动词-ing 形式、从句)放句尾 1.It+is/was+形容词/名词+(for/of sb.)+动词不定式短语. ①It’s important for us to keep the water clean. ②It’s very kind of you to say so. ③It’s a good habit to get up early and go to bed early. 2.It +will be/is/was +no use/no good doing sth. ④It’s no good telling him—he won’t listen. 3.It+谓语结构+从句. ⑤It occurred to me that I should ask the police for help. ⑥It’s true that he may fall behind the other students. ⑦It is said that there will be a big test in a few days.;五、用作形式宾语,当复合宾语的宾语是不定式、动词-ing形式、宾语从句时,往往把宾语放到宾语补足语之后,而用it作形式宾语,放在宾语补足语之前。 make/think/believe/find/feel/consider...+it+adj.+to do ①He found it not easy to learn a foreign language well. ②I think it appropriate to invite her to speak at the meeting. 六、由it构成的常用固定搭配 1.make it/manage it在口语当中相当于succeed,表示“成功,做到,说定,赶上,及时到达”。 ①It’s hard to make it to the top in show business.;2.as it is (1)相当于in fact,in reality表示“事实上,实际情况是”。 ②We had planned to finish the task today,but as it is we probably won’t finish it until next week. (2)相当于方式状语从句,表示“照原样”。 ③Leave the table as it is. 3.that’s it (1)相当于that’s all或that’s so much,表示“到此为止,没有别的了”。 ④You can have one more sweet,and that’s it. (2)相当于that’s right,表示“对啦”。 ⑤—I guess the key to the problem is the choice “A”. —That’s it.;4.catch it 在口语中,相当于be punished/scolded for doing sth.wr