什么是主语从句?
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主语从句,即主句中的主语由句子担任,常看作单数,为名词性从句的一种类型。引导词常有 what、who、whether、that 等,what 在从句中充当成分(主语、宾语),that 在从句中常只作为连词,不充当句子成分。
例:What she said makes us very unexpected.
(主语部分:What she said, 引导词:what)
In fact, whether John will go for a picnic or not has no effect on our choice.
(主语部分:whether John will go for a picnic, 引导词:whether)
Who will abtain the first award still be unknown before the match is over.
(主语部分:Who will abtain the first award, 引导词:Who, 时间状语从句:before the match is over)
注:
主语从句中时态不受主句影响。
形式主语也可看作主语从句,主语为连词后的从句部分。
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