that is why是什么从句
原因表语从句。
句子主干是 That is why。That 主语,is 系动词,why在句子中的成分是表语。
从句we all suopport his idea 是表语why 的补充说明(表原因),即原因表语从句。
原因表语从句从属连词有because(因为), as(由于), since(既然), now(that)(既然), when(既然), seeing (that) (由于,鉴于), considering (that)(考虑到), given (that) (考虑到),for(为)等。
扩展资料:
原因状语从句表原因, 常见的原因状语从句的引导词:
1.、because引导的原因状语从句一般放于主句的后面,because从句位于句首时要用逗号分开,放在句末 时,可不用逗号分开。because表示直接原因, 语气最强, 最适合回答why引导的疑问句。
例如:
I do it because I like it.
我做这件事是因为我喜欢。
You can trust those products because the quality never varies.
你可以信赖那些产品,因为它们的质量从来不变。
We went by bus because it was cheaper.
我们乘公交汽车去,因为这样便宜一些。
注意:“not ... because”结构中的not否定的是because引导的整个从句。
参考资料来源:百度百科—原因状语从句
二、由连接代(副)词引导的表语从句
连接代词who, whom, whose, what, which, whoever, whatever, whichever;
连接副词where, when, how, why。
That was what she said this morning in her bedroom.那就是她今天早晨在卧室中说的。
that was why he did not come to your birthday party . 那就是为什么他没有来你的生日party
why
it
is
that
the
relationgship
between
them
is
good
again
now是它的宾语。然后是一个强调句,结构是it
is...that...,你可以把it
is...that...去掉再判断,这样就不会干扰了,因为强调句把it
is...that...去掉仍然是完整的。
比如Many people believe this is why we have two ears and only one mouth.
很多人相信这就是为什么我们有两只耳朵而只有一张嘴的原因。
believe 谓语,后面接宾语,所以是宾语从句。
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