现在完成时态笔记.doc
Unit9单元笔记
现在完成时的相关语法
一、现在完成时的构成: have /has done(过去分词P120)
否定:have/has not done 疑问句: 把have/has 提前
例如:我已经做了作业。I have done my homework.
我还没写过信。I haven’t written letters.
他刚看了这本书。He has just read the book.
你吃过汉堡包吗?Have you eaten hamburgers?
你学过什么了?What have you learned?
二、意义:
1,用法1:过去发生或完成的动作对现在的影响.如:
I have eaten breakfast.(我已经吃了早餐不用再吃)
He has bought an apple.(他现在有1个苹果)
本时态标志词:
already (“已经”,用于肯定句中,放在have /has之后或句尾);
例如:我已经完成了我的英语作业。
We have finished my English homework already.
We have already finished my English homework.
yet(“仍然”“还”,用于疑问句或否定句的句尾)例如:我还没有完成作业呢。I have not finished the homework yet.
你清洁了房间了吗?--还没有。Have you cleaned the room yet? ——Not yet.
just(“刚刚”,放在have /has之后)例如: 我们的老师刚刚离开.Our teacher has just left.
before(“以前”,放在句尾);例如:我之前已经看过这部电影。I have seen this film before.
ever(“曾经”,放