文档介绍：the Present Perfect Tense
现在完成时
助动词have (has)+过去分词done
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过去分词的构成
-ed。如：play-played
。如：name-named
，变y为i加ed。如：carry-carried
，双写这个辅音字母再加-ed。如：stop-stopped
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现在完成时 Present perfect 句型

现在完成时的肯定句式是“have（has）＋过去分词”。
注意：该句式中的have或has是助动词，has用于第三人称单数，其它人称一律用have。

　　现在完成时的一般疑问句式是把助动词have或has提到主语之前。（回答用“Yes，．．．have（has）．／“No，．．．haven’t（hasn’t）．” ）
：现在完成时的否定句式是“haven't（hasn't）＋过去分词”。
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I have eaten my lunch.
She has eaten her lunch.
He has eaten his lunch.
肯定句
They have eaten their lunch.
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I have not (haven’t) seen the film.
She has not (hasn’t) seen the film.
现在完成时的否定形式：
have not (haven’t) +过去分词
has not (hasn’t) +过去分词
I haven’t eaten supper. eat-eaten
He hasn’t changed his idea. change-changed
My mother hasn’t come back home. come-come
否定句
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I’ve already had dinner.
I ________ ________ dinner ________.
2. He has just finished his homework.
He ________ ________ his homework _________.
3. Mum’s cooked the dinner.
Mum _______ ________ the dinner.
4. Susan’s learned English at school.
Susan ________ ________ English at school.
haven’t
had
yet
hasn’t
finished
yet
hasn’t cooked
hasn’t
learned
把下列句子改为否定句
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Have you eaten your breakfast?
现在完成时的一般疑问句形式
Have/has 提前+过去分词
Have you known Sandy for a long time?
Yes, I have/ No, I haven’t. know-known
Has she eaten anything since 9:00 .
Yes, she has/ No, she hasn’t. eat-eaten
疑问句
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I’ve already had dinner.

2. He has just finished his homework.

3. Mum’s cooked the dinner.
4. Susan’s lea