苹果手机怎么买东西:过去完成时态讲解及练习
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过去完成时的自我介绍
<表现形式>
1. 基本形式:had + 过去分词。
2. 否定形式:had + not + 过去分词(had not照样可缩写hadn't)。
3.一般疑问形式:had提到句首,回答用Yes, 主语 + had. / No, 主语 + hadn't. 例如:
--- Had she told you to go there earlier yesterday? 她昨天告诉过你早点儿到那儿吗?
--- Yes, she had. / No, she hadn't. 是的,她告诉了。/ 不,她没有。
4. 被动语态形式:had + been + 过去分词。如:
When I got there, the windows had been broken. 当我到那儿时,窗户已经被打破了。
<最佳拍档>
我可是个相对的时态,自然不能离开过去某时 / 动作而“独闯天下”,只能早于过去某时 / 动作,或频频“光顾”于主句为一般过去时的宾语从句中,所以already / yet / still / just / before / never / by(the end of)last year 等时间状语常来“配合作战”;也常活跃在after / before / when + 过去时态从句或by the time + 过去时态从句等的主句中。如:
By the time we got there, she had left. 当我们到达那里的时候,她已经离开了。
<与其他时态间的联系与区别>
1. 与一般过去时态“小同大异”:我和一般过去时都可指动作发生在过去,但我强调动作相对于过去某一时刻已经完成;而一般过去时则强调动作发生在过去某一时间或过去经常性、习惯性动作,需要特别注意的是:当动作附带yesterday、last year等过去时间状语时,应用一般过去时态。请区别:
By the end of last year, I had visited seven different cities.
截止到去年年底,我已经参观过七个不同的城市了。
We learned another English song last month. 上个月我们学了另一首英文歌曲。
2.与现在完成时态“似是而非”:现在完成时表示动作相对于现在已经完成,其标准对照时间点为现在;而我表示动作相对于过去某一时刻前已完成,其标准对照时间点为过去。试比较:
I have been there twice. 我去过那儿两次。
I had been there twice before I went to school. 在我上学前,我去过那儿两次。
【完成时态专练】
1. He ___________(turn)off the light. We can leave now.
2. By the time we got to the cinema, the film ___________(begin).
3. She ___________(finish)her homework before I left school.
4. My mother ___________(be)a teacher since 2003.
5. He told us that he ___________(give)the book to his brother.
6. I ___________(wash)all the clothes. So I can have a rest.
7. They ___________(stay)in China for a long time.
8. My father ___________(arrive)home before nine o’clock last night.
【参考答案】
1. has turned
7. have stayed