Ｓｉｎｃｅ ａｎｄ Ｆｏｒ

Clever Mouse: I haven' t seen Lily since last summer.

Miss Bee: She is in Paris now. She' s been there for haof a year.

Clever MouSe: You know her well.

Miss Bee: We ve been good friend since we were nine.

難點一

Since意思為“自從”，它只能與完成時連用，如現(xiàn)在完成時，表示時間的一點或動作開始的那一點，不能與其它時態(tài)連用。

如：I've stndied English since 1ast year．對

I studied/I am studying/I will study English since last year.錯

難點二

Since與現(xiàn)在完成時連用，還可以引導一個表示時間的從句，用一般過去時。

如：I've studied English since I was at university．

We haven't seen my family since we left．

難點三

常與since連用的時間狀語有：last year，June 8，I met you等。

難點四

For可以與現(xiàn)在完成時連用，表示一段時間。

如：I havehad this computerfor about a year.

I've lived here for 9 months．

難點五

常與For連用的時間狀語有：a few days．half an hour，two years等。

請用since或for填空:

1. I've lived here__________March.

2. Sue has only been waiting_____________20 minutes.

3. Tim and Tina have been learning Englishsix years.

4. Fred and Frank have been learning French____________1998.

5. I haven't seen Julia_____________September.

6. I've been here____________9.00 this morning.

7. She's been here_____________5 hours.

8. I haven't eaten anything_______________breakfast.

9. You have been watching TV______________hours.

10. I have lived here_____________a long time.