延续动词与瞬间动词的区别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。
(表结果) I've known him since then.
　　 我从那时起就认识他了。
(表经历) 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。
典型例题 1.
You don't need to describe her.
I ___ her several times.
A.
had met　B.
have met　 C.
met　D.
meet 答案B.
首先本题后句强调对遥的影响，我知道她的模样，你不用描述。
再次，several times告知为反反复生的动作，因此用遥完成时。
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A.
等待的动作由过去开始，持续到遥，应用遥完成时。