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名词性从句是指能够在句子中充当名词成分的从句,包括主语从句、宾语从句、表语从句和同位语从句。下面就这些从句的知识点做一个简单的归纳。
主语从句
主语从句在句子中充当主语,其引导词有that,whether,who,what,which,when,where,why等。主语从句的谓语动词通常使用单数形式。
例如:
- That he is late again annoys me.(他又迟到了,这让我很烦恼。)
- Whether he will come or not is unknown.(他来不来还不知道。)
- Who will be the winner is still uncertain.(谁会是胜利者还不确定。)
宾语从句
宾语从句在句子中充当宾语,其引导词有that,whether,if,who,whom,whose,what,which等。宾语从句必须跟在某些动词、形容词、名词后面,如believe,know,think,hope,wonder,ask,tell,suggest等。
例如:
- He asked me whether I was free that day.(他问我那天是否有空。)
- I don't know what she is talking about.(我不知道她在说什么。)
- They suggested that we go to the cinema.(他们建议我们去看电影。)
表语从句
表语从句在句子中充当表语,其引导词有that,whether,who,whom,which,what等。表语从句通常跟在be动词、感官动词、make、keep、prove、seem、appear等后面。
例如:
- His idea is that we should start early.(他的想法是我们应该早点开始。)
- It seems that she is not in a good mood.(看起来她心情不好。)
- The fact that he passed the exam made his parents proud.(他通过了考试这个事实让他的父母感到骄傲。)
同位语从句
同位语从句用来解释或说明前面的名词或代词,其引导词有that,whether,who,whom,which,what等。同位语从句通常跟在表示事物、人物、观点等名词后面。
例如:
- The news that he has won the prize is true.(他获得奖项的消息是真的。)
- Her idea that we should take a break is reasonable.(她认为我们应该休息一下的想法是合理的。)
- The question of whether we can finish the work on time is still open.(我们能否按时完成工作的问题还未解决。)
以上就是名词性从句的知识点归纳,希望对大家有所帮助。