when做时间状语从句时的省略when做时间状语从句时的省略,语法书上说WHEN的主语和主句一样,而且when从句的谓语是BE动词,就可以把when从句的主语和谓语省略,但是这个句子: They had studied hard when they were stduents, when中的主语和谓语可以省略吗/?
不行的, 时间状语从句,其实还有条件状语从句和让步状语从句。 你讲的上述条件往往是说:当它的表语是个形容词的时候。是名词时,一般是不省略的。如: Correct the mistakes if (there are ) any Correct the mistakes when (it is ) necessary.
象你这个题出现名词时,往往可以改成as结构。即:They had studied hard as stduents.本回答被提问者采纳