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高中英语新高考语法基础版一轮复习讲义(22)原因状语从句知识点整理总结

高中英语新高考语法基础版一轮复习讲义(22)原因状语从句知识点整理总结
高中英语新高考语法基础版一轮复习讲义(22)原因状语从句知识点整理总结

2021届高中英语新高考语法基础版一轮复习讲义(22)

原因状语从句知识点整理总结

状语从句有九大类,分别是时间、条件、地点、原因、结果、目的、让步、方式、比较状语从句,其中重要的是前7种,需要大家掌握。今天我们就来看原因状语从句。

01 原因状语从句的概念

原因状语从句是指由because等引导的表示“因为,由于”等含义的状语从句。如:

I don't like him because he is selfish.

我不喜欢他,因为他太自私了。

02 原因状语从句的引导词

原因状语的引导词主要有以下三类:

because/for/since/as四大引导词

这四个引导词是原因状语从句最常见的引导词,表示“原因是、由于、因为”。

in that和now that两个短语

in that表示由于,now that表示既然。

动名词做状语

用seeing that, considering that等动名词作状语,表示原因。

03 四大引导词的用法和区别

虽然be cau se/f o r/si n ce/a s都可以引导原因状语从句表示原因,但也有重要区别:

because表示直接原因,因果关系最强

because是原因状语从句最常见、最直接、最适合回答why问句的引导词。如:

He can't go to school because he is ill.

他无法去学校,因为他病了。

because一般不放在句首,可转换成because of + 名词结构。如:He can't go to school because of his illness.

他无法去学校,因为他病了。

since表示显然、双方已知的理由

since表示“既然”,语气比because弱,相当于now that,表示双方都知道的原因。如:

Since you are free today, let's go and watch a movie.

既然你今天有时间,我们就去看电影吧。

as也表示显然、双方已知的理由

as也表示显然、双方已知的原因,但语气更弱,没有since正式,一般翻译为“由于,鉴于”。如:

As it starts to rain, we'd better stay inside.

鉴于已经开始下雨了,我们还是待在室内吧。

for表示补充、附带的理由

for表示补充、附带的理由,与主句可以无因果关系,当与主句有一定因果关系时,可以和because互换。如:

He must be very tired now, for his face looks pale.

他应该很累吧,因为他的脸色看起来有点苍白。

I couldn't walk so fast, for/because my legs are aching.

我不能走太远,因为我的腿有点疼。

注意:for不能位于句首,且和主语要用逗号隔开,for的用法比较正式,常用在书面语之中。

04 in that和now that

in that表示“在于”;now that表示“既然”。前者不能位于句首,而后者可以;now that相当于since。如:

The democratic party is different from the republic one, in that they have different political guidelines.

民主党共和党是不同的,因为(在于)他们有不同的政治纲领。

Now that you have finished your study in the U.S., why don't you come back to serve your own country?

既然你已经完成了在美国的学业,你为什么不回来服务你的国家呢?

05 动名词做原因状语

seeing that.. considering that..等动名词短语可以表示原因,相当于because引导的原因状语从句。如:

Seeing that nobody is interested in our learning program, we decide to cancel it.

既然没人对我们的学习项目感兴趣,我们决定取消它。

Considering that it will rain tomorrow, we will change our hiking activity to another day.

考虑到明天要下雨,我们将改变徒步活动的日期。

结束语

原因状语从句的脉络非常清晰,大家记住4大引导词+2个短语+动名词做状语即可。

高中英语语法总结大全-形容词和副词

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高中英语语法大全归纳总结-高中语法归纳总结

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高中英语语法最重要知识汇总

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