since和for的用法

since

和

for

的用法

(

用于现在完成时

)

表示过去已经开始持续到现在的动作或 状态常用的时间状语有：

for, since, how long,

so far, these days

等。

1. since :

a).since +

时间点①年代

②时刻数

③一段时间

+ago

b).

现在完成时：主句

(

主语

+have/has +

延续性动词的过去分词

)+ since +

从句一般

过去时

c) It’s +

时间段

+since +

短暂性动词的过去式

d).

时间段

+has passed +since +

短暂性动词的过去式

for +

一段时间

练习：

用

s ince

和

for

填空

1) ______ two years

2) _______ two years ago

3) _______ last month

4) ______ 1999

5) _______ yesterday

6) _______ 4 o’clock

7) ______ 4 hours

8) _______ an hour ago

9) _______ we were children

10) _____ lunch time

11) ______ she left here

12). He has lived in Nanjing ________ the year before last.

13). I’ve known him __________ we were children.

14). Our teacher has studied Japanese _________ three years.

15). She has been away from the city ___________ about ten years.

16). It’s about ten years __________ she left the city.

2. for: for +

一段时间

= since +

一段时间

+ ago

3.

与时间段连用时，短暂性动词应改为相应的延续性动词。

1) come/go to ------ be at /in

2)leave ----be away from

3)buy ----have

4) borrow /lend -----keep

4)open ---be open

5)close---be closed

6) die---be dead

7) start/begin ----be on

8) join

—

--be in /be a member of /be a soldier

9) become

–

be

10) fall asleep ---be asleep

11)catch a cold

–

have a cold

12)

have/has gone to → have been in

13) put on → wear

14) finish/end → be

over

15) marry → be married

练习：

.

短暂性转换延续性

1)

His grandfather died two years ago .

His grandfather has ____ ____ for two years.

_____two years _____ his grandfather ____.

Two years ____ ____ ____ his grandfather _____.

2)

I became a teacher in 2000.

I ________

__________ a teacher for _________ _________.

3)

The shop closed two hours ago.

The shop ________ _________ _________ for _________ _________.

4)

The door opened at six in the morning.

The door ________ ________ ________ for six hours.

5)

He left Fuzhou just now.

He _______ ________ ________ _________ Fuzhou for five minutes.