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) ?

知識(shí)點(diǎn)二動(dòng)詞的過去分詞大多數(shù)動(dòng)詞的過去分詞變化形式同動(dòng)詞的過去式，可參照動(dòng)詞的過去式變化規(guī)則。

不規(guī)則動(dòng)詞的過去分詞變化。右此劫詞的討豐分詞釦過去太的變化形式相同，其變化情況如下：

有些動(dòng)詞的過去分詞和過去式的變化形式不同，其變化情況如下：

( )3(單項(xiàng)選擇）I won’t go to the concert because I my ticket.

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

知識(shí)點(diǎn)一現(xiàn)在完成時(shí)

 (1) 表示過去發(fā)生或已經(jīng)完成的某一動(dòng)作對(duì)現(xiàn)在造成的影響或結(jié)果。常與just,yet,ever,never,already,before 連用。

() 1.(單項(xiàng)選擇) 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) 表示動(dòng)作或狀態(tài)開始于過去，一直延續(xù)到現(xiàn)在，甚至還可能繼續(xù)延續(xù)下去。常與for,since,so far,in the past/last+—段時(shí)間，recently 等連用。

2.  (翻譯) 李先生從出生以來就住在這里。

Mr Li here he was born.

基礎(chǔ)詞匯過關(guān)(寫出下列動(dòng)詞的過去式和過去分詞)

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