1、点成教育 1.it,one,that 作代词时的区别 :it 特指上下文提到的是同一事物。one 泛指上下文提及的同类事物中的一个，属于同一类而不是同一个事物。that 常用在比较结构中，代替前面提到的名词，以避免重复。如：Who has a pen?I have one.The book is mine.It is very interesting.The weather in Shenyang is much colder than that in Guangzhou in winter.2.it 的用法：1）不知性别的孩子（婴儿）：Her new baby is tiny.It only
2、 weighs 2 kilos.What a beautiful babyis it a boy?2)指代前面提到过的事物。如：The book on the desk is not mine.It is Toms.Where is my map?I left it on the table. Look at the bird.It always comes to my window.3)指不明身份的人。如：Who is shouting in the classroom?It must be Tom.4)表示时间、距离和天气。如：It is raining(snowing)!Whats th
3、e weather like today?It is sunny.What time is it? It is eight oclockWhats the date? Its the third of April.How far is it to Chicago?Its 700 kilometers.5）用作形式主语，常用在下列句型中：Its+adj.+(for sb.)to do sth.Its time to do sth./for sth./that 从句It seems thatIts ones turn to do sth.Its+adj.+that 从句Its important
4、for us to learn English.Its time to go to school.It seems that she is very excited.Its your turn to make a brief introduction about yourself.Its necessary that you should read English every morning.6)作形式宾语Do you think it difficult to learn English?I found it easy to surf the Internet.7)引导强调句型It is/was +被强调部分+that/who/whom+其他成分It was on the cold morning that we saw an exciting film.(强调状语)It is I who/that am right.（强调主语）It was him that/who we met at the school gate.（强调宾语）It was in the park that Peter lost his money.(强调状语)
