一、现在完成时
1.定义:现在完成时,表示动作过去发生,已经完成,对现在造成影响或后果。动作可能还会持续,可使用的时间状语为:
already(已经)
yet(还)
2.现在完成的结构:have+动词过去分词(done)。需要注意:大多数动词的过去分词跟过去式形式是一样的,但有些动词的过去分词变化是不规则的,与过去式形式不一样。
(1)They have already arrived in Shanghai.他们已经到达上海了。
(2)She has played soccer for 3 hours. 她已经玩了3个小时的足球了。
(3)She hasn't finished the homework yet.她还没完成家庭作业呢。
二、过去完成时
1.定义:过去完成时表示句中的动作发生过去之前,即过去的过去,已经完成,对过去造成一定的影响或后果。
2.过去完成时结构:had+动词过去分词(done)。
(1)She said that they had arrived in Shanghai.她说他们已经到达上海了。
(2)Her father said that she had played soccer for 3 hours.她的父亲说她已经玩了三个小时足球了。
(3)I forgot I had left my key at home. 我忘了,我把钥匙落在家里了。
课后练习(答案在文末)
- He _____ (stop) the car out side. 一般完成时
- She _____ (not be) Sichuan yet.一般完成时
- _____ they_____(plan) to stay here.过去完成时
课后练习答案:
- has stopped
- hasn't been
- Had planned