八下英语重点语法知识全汇总

八下英语重点语法知识全汇总一般将来时态的应用

do/does 的一般将来时态形式：(shall/will) do

do/does 的一般将来时态的被动语态：(shall/will) be done

一般将来时态的肯定句、否定句、疑问句形式：

肯定句例句：People will have robots in a few years.

否定句例句：People (will not/won't) have robots in a few years. 一般疑问句例句：Will people have robots in a few years?

特殊疑问句例句：What will people have in a few years?

重点语法

过去将来时

一、过去将来时的结构

should/would+动词原形

do/does 的过去将来时态形式：(should/would) do

do/does的过去将来时态的被动语态：(should/would) be done

过去将来时态的肯定句、否定句、疑问句形式：

肯定句例句：You should write a letter to him.

否定句例句：You shouldn't write a letter to him.

一般疑问句例句：Should I write a letter to him?

特殊疑问句例句：What should I do?

重点语法

过去进行时

do/does 的过去进行时态形式：(was/were) doing

do/does 的过去进行时态的被动语态：(was/were) being done

过去将来时态的肯定句、否定句和疑问句形式：

肯定句例句：I was walking down the street when a UFO landed.

否定句例句：I wasn't walking down the street when a UFO landed.

一般疑问句例句：Were you walking down the street when a UFO landed? 特殊疑问句例句：What were you doing when a UFO landed?

动词when 和while 的选择：when 后加瞬间动词，while 后加延续性动词。例句：The boy was walking down the street when the UFO landed.

=While the boy was walking down the street, the UFO landed.

重点语法

宾语从句

结构：主语+ 谓语动词+ 宾语从句(主语+ 谓语动词+ 宾语/表语)

1、引导名词性从句的连接词

（1）that：没有含义，在宾语从句中不做成分

（2）whether/if：表示是否，宾语从句中不做成分。

I don't know if /whether he still lives here after so many years. 我不知道这么多年后，他是否还住在这里。

（3）连接代词：what, which, who, whom, whose(在宾语从句中做主、宾、表和定语)

连接副词：where, when, how, why(在宾语从句中做状语)

2、在做宾语从句的题目时应注意时态

（1）当主句是现在时态时，宾语从句可以根据需要使用任何时态。

He tells me that his sister came back yesterday.他告诉我他姐姐昨天回来了。

（2）当主句是过去时态时，宾语从句必须是一种过去的时态。

She asked me if I knew whose pen it was.她问我是否知道这是谁的钢笔。

（3）当表示客观事实或普遍真理的句子做宾语从句时，任何时候都用一般现在时。

The teacher said that the earth goes round the sun.老师说过地球绕着太阳转。

重点语法

if 引导的条件状语从句

结构：主句+ if + 条件状语从句

if + 条件状语从句+ [(comma)] + 主句

注意：

在if 引导的条件状语从句中，主句应用将来时态，状语从句用一般现在时态。例句：You'll have a great time if you go to the party.

=If you go to the party, you'll have a great time.

重点语法

现在完成进行时态

do/does 的现在完成进行时态形式：have/has been doing

do/does 的现在完成进行时态的被动语态：have/has been being done

现在完成进行时态所应用的场合：

①某事从过去发生一直持续到现在都在做

②过去发生的动作对现在造成影响

I have been making progress since he talked with me that time.自从那次他与我谈过心后，我天天都在进步。

现在完成进行时态的肯定句、否定句和疑问句形式：

肯定句例句：I have been skating for five hours.

否定句例句：I haven't been skating for five hours.

一般疑问句例句：Have you been skating for five hours?

特殊疑问句例句：How long have you been skating?