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八年级上英语--If引导的条件状语从句

八年级上英语--If引导的条件状语从句

13夏八年级英语语法专项if引导的条件状语从句专项练习

I.条件状语从句的定义:

引导条件状语从句最常用的连词是if,常见的if条件状语从句表示在某条件下,某事很可能发生,条件是可能存在的,主句中某种情况发生的概率也是很高的。

If you ask him,he will help you.如果你请他帮忙,他会帮你的。

If you have finished the homework,you can go home.如果你作业做完了就可以回家了。

另外,if从句还表示不可实现的条件或根本不可能存在的条件,也就是一种虚拟的条件或假设。

从句多用一般过去时或过去完成时,表示对现在或过去的一种假设。如:

If I were you,I would invite him to the party.如果我是你,我会邀请他参加聚会。

I would have arrived much earlier if I had not been caught in the traffic.

要不是交通堵塞,我本会来得早一些。

Ⅱ条件状语从句的引导词

1.if引导的条件状语从句:表示在某种条件下某事很可能发生。

If we pay much attention to the earth, we'll have a better world.

如果我们多关爱地球,就会拥有一个更美好的世界

If it rains tomorrow, what shall we do?

如果明天下雨,我们怎么办?

注意:if还可以引导虚拟条件句,表示不可实现的条件,从句中多用一般过去时或过去完成时。What would happen if there were no water ?

如果没有水会怎样?

2.unless引导的条件状语从句:unless的意思是如果不,除非。可与if...not互换。

You will fail in English unless you work hard.你英语考试会不及格的,除非你更加努力。

3.as /so long as引导的条件状语从句:as /so long as意思是“只要”

So long as you're happy,i will be happy.只要你高兴,我就高兴。

Ⅲif 条件句的时态搭配

1.if从句用一般现在时,主句用一般将来时

If he runs he’l

l get there in time. 如果他用跑的,他就会及时赶到那儿。

The cat will scratch you if you pull her tail. 如果你拉猫的尾巴,它就会抓你。

初二英语 条件状语从句

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人教版中考英语九年级英语状语从句中考选择题含答案解析

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初中英语语法——If引导的条件状语从句(讲解及练习)

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人教版中考英语九年级英语状语从句专项练习题及答案

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