
中考英语之表语从句
什么是表语从句
表语从句是指在复合句中充当表语的从句。表语位于系动词之后,说明主语的身份、特征或状态。
结构:主语 + 系动词 + 表语从句
例子:
The truth is that he lied. (事实是他撒谎了。)
That is why I came. (那就是我为什么来的原因。)
核心特征:表语从句位于系动词(be, seem, look, remain, appear等)之后,对主语进行补充说明。
表语从句的引导词
表语从句的引导词
that陈述事实,无意义,不能省略My opinion is that he is right.
whether表示“是否”,不用if. The question is whether he will come.
what表示“所……的事情/东西”This is what I want.
who表示“谁”That is who I am.
when/where/why/how表示时间/地点/原因/方式That is why I left.
注意:表语从句中,that 不能省略(与宾语从句不同);表示“是否”只能用 whether,不能用 if。
五大考点
考点1:that 引导的表语从句
that 引导表语从句时,只起连接作用,无词义,在从句中不作任何成分,不能省略。
My decision is that we should start at once. (我的决定是我们应该立即出发。)
The fact is that he has never been there. (事实是他从未去过那里。)
考点2:whether 引导的表语从句
表语从句中表示“是否”时,只能用 whether,不能用 if。
The question is whether we can finish the work on time. (问题是我们能否按时完成工作。)
❌ The question is if we can finish the work on time.
考点3:what 引导的表语从句
what 在表语从句中充当主语、宾语或表语,表示“所……的事情/东西”。
This is what I need. (这就是我所需要的。——what 作 need 的宾语)
That is what he wants. (那就是他想要的。——what 作 wants 的宾语)
考点4:because 与 that 的区别
当主语是 reason 时,表语从句用 that 引导,不能用 because。
错误用法
❌ The reason why he was late was because he missed the bus.
正确用法
✅ The reason why he was late was that he missed the bus.
记忆口诀:reason 作主语,表语用 that 不用 because。
考点5:why 引导的表语从句
why 引导表语从句时,表示“……的原因”。
That is why he was angry. (那就是他生气的原因。)
This is why I came here. (这就是我来这里的原因。)
常见结构对比:
That's why... (那就是……的原因) —— 强调结果
That's because... (那是因为……) —— 强调原因
He was late. That's why I got angry. (他迟到了。那就是我生气的原因。——强调结果)
I got angry. That's because he was late. (我生气了。那是因为他迟到了。——强调原因)
学完马上练·效果看得见
1.The reason why he didn't come to school was ______ he was ill.
A. because B. that C. why D. what
The question is ______ the film is worth seeing.
A. that B. if C. whether D. what
3.This is ______ I wanted to say.
A. that B. what C. why D. which


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答案
B【解析】 主语是 reason,表语从句要用 that 引导,不能用 because。
C【解析】 表语从句中表示“是否”,只能用 whether,不能用 if。
B【解析】 表语从句中缺少 say 的宾语,表示“所……的事情”,用 what 引导。