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词的过去分词”构成。助动词要和主语的
人称、数保持一致。
现在完成时
选用have, has填空:
1. I _______ told him the news.
2. She ________ come back from school.
3. You ________ won the game.
have
has
have
I have already taught him some English.
John has never been to the space museum.
My boy has just started junior high school.
标志词：现在完成时常与时间副词already, never, ever, just, before, yet等连用。
1).现在完成时的特殊疑问句的结构是______________；
用______________询问拥有某物品的时间
3. since后接______________；for后接__________。
讨论分析总结回答上面问题
1.A:How long have you had that toy bear ?
B: I have owned the toy bear for more than six years.
2.A:How long has he worked as a policeman ?
B:He as a policeman for ten years.
3.A:How long have they worked here?
B:They have worked here since June.
4.A:How long has she studied English？
B:She has studied English since she was five.
5.A:How long have you known Jack?
B:We have known each other since we were primary
school students
(2) 现在完成时表示从过去某一时刻开始一直持续到现在的动作或状态。这个动作可能刚停止,也可能仍然在进行。常带有for和since等表示一段时间的状语。