大家好，今天小编来为大家解答英语语法初探：助动词这个问题，英语语法初探：助动词很多人还不知道，现在让我们一起来看看吧！

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简单英语语法文章

[本期内容]

一、内容概述

二、内容简述

(1)定义

英语中的助动词本身没有意义，主要是在功能和语法上帮助句子的主动词。

英语中的助动词主要有：be；有；做；将

(2)是

1.构成各种进行时态。比如：

We are watching TV in the room now. When I saw Sally, she was shopping. They have been running for an hour. We had slept for an hour when the fire alarm rang. (past perfect continuous tense)

2.形成被动语态。比如：

The window is broken.The bridge was built.The new program has been declared.Your assignment must be finished by tomorrow.

(3) Yes

形成各种完成时态，如：

They cleared all the evidence. She has been singing. We have arranged everything. The bridge will be completed next Friday. (future perfect tense)

(4) Yes.

形成各种将来时态，如：

He will visit us tomorrow. She said she would go there on foot. By the end of next month, we will have finished the work. He will be reading in the library this time next Friday. (Future continuous tense)

(5)做

有三种形式：do，does和did。

1、构成否定句，如：

I don't like horror movies. John didn't join our club.

2、构成疑问句，如：

Does your brother know Spanish?Did you attend the course yesterday?

3、形成强有力的句子，如：

I do want to marry you.He did sell the house by himself.

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