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 metB. have metC. metD. 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 beenB. had beenC. wasD. 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。