4. She has known Sam . (for,never,since) nine years.

3. 一Have you cleaned your room (for,just,yet) ? —Yes,I have.

2. —How long has Mr Wang worked in our factory?

—He has worked here (already,just,since) he left school.

1. —Is Simon washing the dishes now?

—No,he has (already,ever,for) washed them.

9. Have you done your homework (for,just,yet) ?

知识点二动词的过去分词大多数动词的过去分词变化形式同动词的过去式，可参照动词的过去式变化规则。

不规则动词的过去分词变化。右此劫词的讨丰分词釦过去太的变化形式相同，其变化情况如下：

有些动词的过去分词和过去式的变化形式不同，其变化情况如下：

( )3(单项选择）I won’t go to the concert because I my ticket.

A. lost B. don’t lose c. have lost D. have lose

知识点一现在完成时

 (1) 表示过去发生或已经完成的某一动作对现在造成的影响或结果。常与just,yet,ever,never,already,before 连用。

() 1.(单项选择) 一Have you seen the bag,madam? —No,I have seen it.

   A. ever;never   B. already;before C. just;ever   D. yet;already 

(2) 表示动作或状态开始于过去，一直延续到现在，甚至还可能继续延续下去。常与for,since,so far,in the past/last+—段时间，recently 等连用。

2.  (翻译) 李先生从出生以来就住在这里。

Mr Li here he was born.

基础词汇过关(写出下列动词的过去式和过去分词)

1. be 2. find

3. begin 4. forget

5. bring 6. leave

7. draw 8. work

() 5.    ，do you know where the nearest post office is?

   A. By the way   B. On the way

    C. In the way   D. To the way