英语语法中的延续动词与瞬间动词

1. 用于完成时的区别

延续动词表示经验、经历; 瞬间动词表示行为的结 果,不能与表示段的时间状语连用。

He has completed the work.

他已完成了那项工作。

I've known him since then.

我从那时起就认识他了。

2. 用于till / until从句的差异

延续动词用于肯定句,表示"做……直到……" 瞬间动词用于否定句,表示"到……,才……"

He didn't come back until ten o'clock.

他到10 点才回来。

He slept until ten o'clock.

他一直睡到10点。

看看例题

1. You don't need to describe her. I ___ her several times.

A. had met

B. have met

C. met

D. meet

答案选B. 首先本题后句强调对现在的影响,我知道她的模样,你不用描述。再次,several times告知为反复发生的动作,因此用现在完成时。

2. ---I'm sorry to keep you waiting.

---Oh, not at all. I ___ here only a few minutes.

A. have been

B. had been

C. was

D. will be

答案选A. 等待的动作由过去开始,持续到现在,应用现在完成时。