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高中英语名词性从句讲解-
名词性从句 PART 1
完成以下题目，并分别指出它们是什么从句
1.______ the baby could speak made his parents very happy. A. That B. What C. Why D. If
2. I wonder ______ you will go shopping or stay at home. A. that B. if C. whether D. what
3. This is ______ he was often late for school. A. what B. that C. why D. whether
4. We all know the truth ______ the earth ______ around the sun. A. if; moved B. that; moves C. why; move D. whether; move
名词性从句的功能： 相当于名词词组, 它在复合句中能担任主语、宾语、表语、同位语、介词宾语等。 主语) 主语) 表语) 表语) I don’t宾语)
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I don’t宾语)
I don’t know about同位语) I don’t know about 同位语)
得出结论：因此根据它在句中不同的语法功能，名词从句又可分为四类，即：主语从句、宾语从句、表语从句和同位语从句。 PART 2
名词性从句的类型：
1. 主语从句：在复合句中作主句的主语。连接词有that, whether; who, what ,which; when ,where, how, why 等。 如:
wn to us.
注意：
1. 为避免主语冗长,句子头重脚轻, 经常用it作形式主语, 主语从句放在后面作真正的主语。
记住以下it作形式主语的句型：
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It’s likely / possible / important / necessary / clear that…很可能 / 重要的是… / 必要的是… / 很清楚… It’s said / reported that…据说/据报道…
It seems / appears / happens that…显然、明显、碰巧… It’s been announced / declared that…已经通知/宣布… It’s no wonder that…并不奇怪/无疑…
It’s a pity/a fact /a common knowledge (众所周知）/ a common saying（俗话说）that…
A. while B. that C. if D. for
short time.
A. how B. that C. when D. what
us ______ where there is pollution, there is harm.
A. which B. where C. what D. that
2. 单个的主语从句作主语时， 谓语动词用句单数形式；如果是两个或两个以上的主语作
主语，谓语动词则视情况而定。
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t been found. Exercises:
services.
A. What B. Who C. Whatever D. Whoever
happy.
A. Where B. What C. That D. How
A. Who B. What C. How D. That
should not tell other people the
password of your e-mail account.
A. What is required B. What requires C. It is required D. It requires 2. 表语从句：在复合句中作主句的表语。引导词有连词that , whether, as if, as though; who, what, which, whose; when, where, how, why, because 等。如:
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t him is _________ he has often
lied． 注意：
1. 如果句子的主语是suggestion, advice, order, demand, proposal等名词时,后面引导的表语从句用should+动词原形,should可省略。 他的建议是我们应该马上完成工作. His suggestion is that we (should) finish the work at once.
2. The reason is that … …的理由是，… 的原因是…
The reason __________ he was late again was __________ he was caught in the traffic jam.
The reason ______ I have to go is ______ my mother is ill in bed. A .why; why B. why; because C. why ; that D. that; because 3. It is because … 这是因为… Exercises:
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高中英语名词性从句讲解
