2024年一轮复习中职英语语法专项知识导学案：it的用法

语法专项知识清单：it的用法 It通常有五种用法： ①用作代词；②作形式主语；③作形式宾语；④用于强调结构；⑤其他习惯用法。 一、it 作代词 1.代替事物（无生命、动物、植物和在性别不计或不详时的人和婴儿）。 Who is it knocking at the door? The picture is valuable._____is more than 600 years old. I love swimming._____ keeps me fit. I tried my best to persuade him,but it didn’t help. 2.表时间、天气、距离、温度、环境和情况等。 It ’s half past ten. It’s sunny today. 二、it 作形式主语 it作形式主语代替后面真正的主语：动词不定式、v-ing或主语从句。 it作形式主语时，常用于下列四种结构有: 1.It +be +n.+that从句 It is a fact that…. 译:_______________ It is a pity that... 译:_______________ It is no wonder that... 译:_______________ 2.It +be + adj.+ that-从句 It is certain/sure that…译:_____________ It is necessary that..译:______________ 3.It +be + 过去分词 + that从句 It is said/reported that.….译:______________ It is believed that... 译:______________ It is considered that... 译:_______________ It is well known that... 译:_______________ 4. It + be +n. + doing It is no use doing…. 译: _____________ It is no good doing... 译:__________ It is a waste of time doing...译:____________ 5.It + be + adj. for (of) sb to do sth It is kind of sb.to do sth译:______________ It is important for sb.to do sth 译:______________ 三、it 作形式宾语 it作形式宾语代替后面真正的主语：动词不定式、v-ing或宾语从句。 1.主语+动词 + it + when /if+从句。常见的动词有 enjoy, hate, love, like, dislike, appreciate, prefer 等。 I would appreciate it if you could come to my birthday party.译:__________________________________________ We really appreciate it when she offered to help. 2.主语+动词+it+宾语补足语+不定式(动名词或从句)”。常见的动词有：think, believe, make, find, consider, feel He found it no good telling her the truth. 译:__________________________________________ We considered it necessary that you should make a telephone call to him. 译:__________________________________________ I find it difficult to do the job well. 译:___________________________________ 3、动词have(表明，坚持说)，take(认为，猜想)，hide(隐藏)，publish(公布)，put（表达，写出来)等后接由that引导的宾语从句时，往往在从句的前面加上形式宾语it。 I take it that you will be leaving Shanghai soon. 译:___________________________________ We pub