`IV.`

`1.` have seen

- Thì HTHT - dHNB: before

`2.` saw

- Thì QKD - DHNB: last year

`3.` has never been

- Thì HTHT - DHNB: never

`4.` have read

- Thì HTHT - DHNB: several times

`5.` did you do

- Thì QKD - DHNB: yesterday

`6.` Did you watch

- Thì QKD - DHNB: last night

`7.` was

- Thì QKD - DHNB: in 1980

`8.` has written

- Thì HTHT - DHNB: since last year

`9.` has taught - graudated

- Thì HTHT - DHNB: since....

- Thì QKD - DHNB: in 1986

`10.` have you learnt

- How long + have/has + S + VpII + ...?

1,i saw her before (before : simple past noi 1 viec da xay ra)

2,i saw her last year (last year : noi 1 viec da xay ra nam truoc)

3,tom has never been in hanoi (has never been : chua tung toi nen phai them has)

4,i readed the novel writen by jack london serveral times before ( serveral times before : da tung doc : qua khu nen read phai chuyen thi qua khu)
5,what did u do yesterday(yesterday : qua khu hom qua)

6,you watched tv last night(last nigh : qua khu toi hom qua)

7,she was born in 1980(qua khu)

8,he hasnt written a book since last year ( since last year : 1 viec chua xay ra ke tu nam trc)

9,me green teached english in this school since he graduated from the university in 1986 ( since : noi ve qua khu )

10,how long have you been learing english ( how long )