It句型归纳最全总结.docx

It句型归纳总结

I． It作形式主的句型

①It + be + adj (kind , wise , careless, clever⋯) + of sb to do sth

Eg: It is wise of him to make such a decision.他做出的决定是明智的。

②It + be + adj(easy , safe , common , normal⋯) + for sb to do sth

句型中adj 若 important, necessary, natural, possible, strange, vital, essential 等可改从句 ,从句用

.Eg: It’svery dangerous for children to play with fire.

It is important for us to learn English well.(= It is important that we (should) learn English well.)

should+原形。

③It + be +V-ed( reported, believed, said, suggested ⋯ ) + that 从句

句型中：⑴若 V-ed reported, believed, said 等常“据道”，“据”，“据”。⑵若 V-ed suggested, ordered, demanded, insisted 等表示“建”,“命令”的，从句要用虚气 (should)+原形。

Eg: It is suggested that the book (should) be revised.

It’s said that Tom has been back from abroad. (=Tom is said to have been back from abroad.)

④It + be + n (a pity, a shame, a fact , good news ⋯ ) + that 从句 :?

句型中，从句一般用(should) + 原形，表示出乎意料，常＂竟然＂。

Eg: It is a pity that such a thing ( should ) happen in your class.种事竟然生在你班上，真是憾！

⑤It is useless/no use/no good /pleasure+ doing sth

此句型中的it 是形式主 , 其后的名短是真正的主,“做⋯没有用”。

Eg : It ‘s useless arguing with him further. // It ’sno use talking with him, because he won ’tlisten.

⑥It takes sb. ... to do sth.

句型中 it 是形式主，真正的是 to do sth ，常＂做．．．要花某人．．．＂。

Eg: It took thousands of people many years to build the Great Wall.

II．It 作形式的句型

1. sb find/ believe/ think/ feel/ consider/ make + it +n/adj +to do或从句

句型中的it 作形式。了方便我可称句型“6123 构”。6 consider, feel； 1 指的是形式it； 2 指的是的两种形式：形容或名；

名短或that 引的从句。

Eg: We think it our duty to clean our classroom every day.

He felt it important learning English well.

They found it difficult that they would finish their work in two days.

2. 主＋ hate / dislike / love / like＋it＋when－从句

Eg: I hate it when people speak with their mouths full.

3. 主＋ appreciate＋it＋if－从句

Eg: I really appreciate it if you could help me with my math.

4. sb. depend on/count on/rely on/see to(，确保 ) / answer for it that⋯指主句中常用的：think, believe, make, find, 3 指的是真正的三种形式：不定式短，

5.sb. take it for granted that ⋯⋯⋯是理所当然的

Eg: I take it for granted that he will succeed.

III.It 引的句型

⑴It + is/has been+段+ since 引的状从句:?

句型中从句一般用去，句意“自从 ......以来已多久了”

Eg : It is 5 minutes since the bus left.公汽开走已有 5 分了

⑵It + be （will/was ）+ 段+ before 引的状从句:

句型中，主句be 若肯定式，意“ 多久才......；若” 否定式，意“没多久就......。”

Eg : It will be long/ 3 hours before he comes back. 要三个小他才会回来

It was 3 hours before he came back. 了三个小他才回来

⑶It + be + 点+ when 引的状从句