【简明语法】5.4 助动词have的用法

1）have +过去分词，构成完成时态，例如：
　　He has left for London.　他已去了伦敦。
　　By the end of last month, they had¹ finished² half of their work.　
　　上月未为止，他们已经完成工作的一半。

2）have + been +现在分词，构成完成进行时，例如：
　 I have been studying English for ten years.
　 我一直在学英语，已达十年之久。

3）have+been +过去分词，构成完成式被动语态，例如：
　 English has been taught³ in China for many years.
　 中国教英语已经多年。

1 had   

vbl.have的过去式和过去分词；conj.有

参考例句：

• I just had a good idea!我有个好主意！
• The boy had a small branch of a tree in his hand.这个男孩手上拿一条小树枝。

2 finished   

adj.完成的，精湛的；v.动词finish的过去式和过去分词

参考例句：

• We finished up everything there was on the table. 我们把桌上的东西全吃完了。
• We can certainly have the job finished on time.我们肯定能按时完成任务。

3 taught   

v.teach的过去式过去分词

参考例句：

• Children must be taught to be careful of traffic.必须教育孩子要当心车辆。
• Miss Brown taught my daughter last year.去年是布朗小姐教我女儿的。