Please state the tenses for each sentence.?

Question

a) perfect continuous
b) past perfect continuous
c) neither

1. Chris had been working for ten hours when he fell asleep.
2. Amy has been swimming since she was young.
3. Despite his weight problem, Mark has been eating fatty food and chocolate since his return to England.
4. When I arrived, they'd been waiting for twenty minutes.
5. When the comany went bust, I'd been working there for five years.
6. I'v been fighting this cold for a week now.
7. When I saw the girl walking into the restuarant last night, I could have sworn that I'd met her before.
8. The government has been keeping UFOs secret since the incident at Roswell.
9. My sister's tried giving up smoking for years now.
10. I'd never have guessed that Russel Crowe dies at the end of Gladiator.
11. Before he police turned up, the people had been rioting for two hours.
12. Have you ever had the feeling that you're being followed?

Answer 1

1 b
2 a
3 a
4 b
5 b
6 a
7 c - not continuous
8 a
9 c - not continuous
10 c
11 b
12 c - not continuous

the structure for a is have/has + been + -ing
the strcture for b is had+ been + -ing

Answer 2

1) B
2) A
3) A
4) B
5) B
6) A
7) C
8) A
9) C
10)C
11) B
12) C

Answer 3

1.b
2.a
3.a
4.b
5.b
6.a
7.c
8.a
9.c
10.c
11.b
12.c

Basically, if the sentence has "had been" in it, its past perfect continuous
If it has "have been" its present perfect continuous
anything else its neither!
Hope that helps

Answer 4

1. b
2. a
3. c
4. a
5. b
6. a
7. c
8.a
9. a
10. c
11. b
12. b

Answer 5

1-b
2-a
3-a
4-b
5-b
6-a
7-c
8-a
9-c
10-c
11-b
12-c