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名词性从句的语法结构与用法
名词性从句是在句中充当名词的从句,它可以充当主语、宾语、表语或同位语。名词性从句在句子中起着非常重要的作用,掌握其语法结构和用法十分必要。
一、主语从句
主语从句是指充当主语的名词性从句。常见的引导主语从句的词有: 1. 从属连词that:That he is innocent is beyond doubt.(他的清白是毋庸置疑的)
2. 连接代词what:What she said is true.(她说的是真的)
3. 连接副词whether:Whether he can pass the exam remains to be seen.(他能否通过考试还有待观察)
4. 连接副词if:If it rains tomorrow, we will stay at home.(如果明天下雨,我们会呆在家里)
二、宾语从句
宾语从句是指充当动词或介词宾语的名词性从句。常见的引导宾语从句的词有:
1. 从属连词that:We know that he is a good student.(我们知道他是个好学生)
2. 连接代词what:She doesn't understand what you mean.(她不明白你的意思)
3. 连接代词who/whom:I will tell them who is responsible for this.(我会告诉他们谁对此负责)
4. 连接副词when:I can't remember when I met him.(我记不得我什么时候见过他)
三、表语从句
表语从句是指充当表语的名词性从句。常见的引导表语从句的词有: 1. 从属连词that:His biggest dream is that he can travel around the world.(他最大的梦想是能环游世界)
2. 连接代词what:The important thing is what you do, not what you say.(重要的是你做什么,而不是你说什么)
3. 连接代词who/whom:The question is who will take over his position.(问题是谁会接任他的职位)
四、同位语从句
同位语从句是指与一个名词或代词作同位关系的名词性从句。常见的引导同位语从句的词有:
1. 从属连词that:His belief is that honesty is the best policy.(他的信念是诚实是最好的策略)
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