导图社区 主语从句
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主语从句
高中英语语法—主语从句，作主语 谓语动词前，如it作形式主语，还介绍了主谓一致相关知识。
编辑于2023-06-10 15:42:02 湖南- 高中英语
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主语从句
用法
作主语 谓语动词前
it作形式主语
It is+n.（a pity/a shame/a good idea/no wonder/…)+主语从句
使用pity 和shame 时，从句中一般用（should+）动词原形，表示“竟然” 如果没有这个意思，就不需要用虚拟语气 It is a pity that such a thing (should) happen in your class. It is a pity that he is ill.
It is (high) time+that sb. did sth./that sb.should do sth.（注：should不可省略）
It is+adj.(clear/obvious/likely/true/…)+主语从句
It is+adj.(necessary/important/natural/strange/urgent/impossible等表惊奇或理应如此) +that+ sb.+(should)+动词原形
It is+过去分词（said/reported/believed/thought/announced/…）+主语从句
It+不及物动词+主语从句
It happened that…
It doesn't matter whether…
It+及物动词+宾语+主语从句
It worries/shocks sb. that…
It occurred to sb. that…
主谓一致
主语从句通常看作一个整体，主句的谓语动词用单数 e.g. That he has made a mistake is clear. It is clear that he has made a mistake.
what引导的主语从句由后面的表语判断 e.g.What he wants are these books. What he wants is this book.
两个引导词引导同一个主语从句用单数
and连接的两个主语从句用复数
主语从句
用法
作主语 谓语动词前
it作形式主语
It is+n.（a pity/a shame/a good idea/no wonder/…)+主语从句
使用pity 和shame 时，从句中一般用（should+）动词原形，表示“竟然” 如果没有这个意思，就不需要用虚拟语气 It is a pity that such a thing (should) happen in your class. It is a pity that he is ill.
It is (high) time+that sb. did sth./that sb.should do sth.（注：should不可省略）
It is+adj.(clear/obvious/likely/true/…)+主语从句
It is+adj.(necessary/important/natural/strange/urgent/impossible等表惊奇或理应如此) +that+ sb.+(should)+动词原形
It is+过去分词（said/reported/believed/thought/announced/…）+主语从句
It+不及物动词+主语从句
It happened that…
It doesn't matter whether…
It+及物动词+宾语+主语从句
It worries/shocks sb. that…
It occurred to sb. that…
主谓一致
主语从句通常看作一个整体，主句的谓语动词用单数 e.g. That he has made a mistake is clear. It is clear that he has made a mistake.
what引导的主语从句由后面的表语判断 e.g.What he wants are these books. What he wants is this book.
两个引导词引导同一个主语从句用单数
and连接的两个主语从句用复数