My house, which I bought last year, has got a lovely garden.
This novel, which I have read three times, is very touching.
3) 非限制性定语从句还能将整个主句作为先行词, 对其进行修饰, 这时从句谓语动词要用第三人称单数,例如:
He seems not to have grasped what I meant, which greatly upsets me.
Liquid water changes to vapor, which is called evaporation.
说明:关系代词that和关系副词why不能引导非限制性定语从句。
b. 名词性从句
在句子中起名词作用的句子叫名词性从句。名词性从句的功能相当于名词词组,它能在复合句中作主语、宾语、表语、同位语等。根据它在句中不同的语法功能,名词性从句分为主语从句、宾语从句、表语从句和同位语从句。在名词性从句中,连接词that既没有实际意义,又不充当任何成分,只起引导从句的作用, 引导宾语从句时经常省去。
一、主语从句 :在复合句中作主句的主语。为保持句子结构平衡,主语从句通常被置于句末,而用it作形式主语。
That light travels in straight line is known to all.
When the plane is to take off hasnt been announced.
It was my fault that I had him play football yesterday afternoon.
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