...进行时也是跟主句谓语时间一致的。问题2:定语从句的时态与主句的时态需要一致吗?请曹老师判断以下例句的对错以及区别是啥(1)The man who prepared documents is my former schoolmate.(2)The man who prepared documents was my former schoolmate.(3)The man ...
I have been winter swimming for about four year.现在完成进行时的形式为:have been doing sth. swimming是现在分词,构成 have been doing的结构,那这里的winter如何理解?现在分词前加入winter名词修饰如何理解?