Ex 1 : 
1.Have just cycled 
2.cycled 
3.wrote 
4.have already written 
5.just rang 
6.rang 
7.watched 
8.have already seen 
9.spent 
10.haven't been 
Ex 2 : 1.Have you ever been to London ?
-Yes i have been 
2.are , is 
-spent , went 
3.Did you like it ? 
- had 
4. Lucky you, i have never been to London 
-Của bạn đây nhé ^^

=>

Bài 6/

1. have just cycled

2. cycled

3. wrote

4. have already written

5. have just rung

6. rang

7. watched

8. have already seen

9. spent

10. haven't been

Bài 7/

1. Have you ever been

2. have been

3. was/were 

4. spent/went 

5. Did you like

6. had

7. have never been

Thì QKĐ

Đối với động từ tobe

(+) S was/were...

(-) S was/were not...

(?) Was/Were S...?

Đối với động từ thường

(+) S V2/ed

(-) S didn't V

(?) Did S V?

Thì HTHT

(+) S have/has V3/ed

(-) S have/has not V3/ed

(?) Have/Has S V3/ed?