文档介绍：.careful you want knowledge, you must toil for ,就得吃苦。要想求知,就得吃苦。.careful person..careful aim:You should grasp the usage of “it”.us?1. It’s three years since he left here .用于指时间2. How far is it from here to the station?用于指距离3. It was very quiet in the garden .用于指环境4.⑴. It’s very cold today .⑵. It’s 37℃ cannot help it . 没办法了。“How’s it going?”“well,not so good.”用于笼统地谈论某情况类似的:make it, take it easy, got it…Impersonal pronouns非人称代词make it(1)eed,表示:成功、做到、说定、赶上、及时到达例It's hard to make it to the top in show business.(2)在口语中相当于fix the date for,表示“约定好时间”例—Shall we meet next week?—OK. We just make it next . take it/things easy 相当于Don‘t worry or don’t hurry. 用来劝告别人,表示“不要慌,别担心,沉住气”Take it easy!He will do it . It all depends/that all depends 在口语中,相当于it hasn‘t been decided yet,表示“那得看情况,还没有定下来”—Are you going to the countryside for holiday?—It/That all . It's up to sb. 在口语中,相当于it's decided by sb. 表示“由……决定,由……负责,取决于……”—Shall we go out for dinner?—It's up to Pronouns人称代词用于指事物。It用作人称代词最基本的用法就是代替前面已提到过的事物本身,以避免重复。 cannot find my watch;I must have lost 。主要用于指动物或性别不详的婴儿。2. ①“Where is the cat?’’“It is under the bed.”②They got a baby and it is very 。3. He smokes a lot in bed and I don’t like 。it 用于指人主要用于确定未知人的身份:4.①“Who is it?”“It’s me.”②Someone must have been here. But we have no idea who it was.?,主要用于确定未知的或身份不明的人,若是指已知的或身份明确的人,则应根据情况使用he或she。⑴I hear a knock at the door. It must be the postmen.⑵Jim is at the door. He wants to see . 指物时it / one / that的区别。三者均可代替前面提到的事物,区别是:It是指与前面已提到的事物为同类同物,It= “the (this, that, my’…)+名词”;One泛指与前面已提到的事物为同类不同物,one=“a+名词”,one 的复数是ones;That特指前面已提到的事物为同类不同物,that= “the+名词”,that的复数是those.⑴. I have a pen but I’ve lent it to Mary .⑵. I haven’t a pen ; can you lend me one ?(3).Pingtan’ weather is more cold than that in : Parkers bought a new house but ___ will need a lot of