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__will go fishing tomorrow depends on the weather A.if B.whe

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__will go fishing tomorrow depends on the weather A.if B.whether C.that D.where
主语从句中能用where等词吗?
为什么?
__will go fishing tomorrow depends on the weather A.if B.whe
答案:B
翻译:我们明天是否去购物取决于天气状况.
主语从句和宾语从句一样,都属于名词性从句,结构都是:引导词 + 陈述句序.
其引导词都分为三种:
1)that引导:这表明从句原来是陈述句,且不缺少任何成分(主语从句的that不能省略)
如:(That he was late again) made me angry.
= It made me angry that he was late again.
他又迟到了,这使得我很生气.
2)whether引导:这表明从句原来是一般疑问句或反意疑问句或选择疑问句(主语从句不能用if)
如:(Whether he died yesterday) is unknown to me.
= It is unknown to me whether he died yesterday.
我不知道他昨天是否死了.
3)其他特殊疑问句的疑问词(wh-)引导:这表明从句原来是特殊疑问句,且疑问词在从句中要充当一定的成分
如:(Where he went yesterday) is a secret.
= It is a secret where he went yesterday.
他昨天去哪里了,这是一个秘密.
所以,就像宾语从句的引导词一样,that/whether或其他任何特殊疑问词都可以做主语从句的引导词.
只有if不能做主语从句的引导词.