I :
1. They have lived here for ten years .
2. They have checked the machines for two hours .
3. Nam has learned English since 1998.
4. Nam has played computer game since 2002
5. Ha hasn't gone abroad before.
6. She has driven for 1 month.
7. We have eaten since it started to rain.
8. I haven't had such a delicious meal before.
9. I haven't had my hair cut since I left her
VIII :
1. Lan has studied English for five years .
2. Although The sun was shining, it wasn't very warm.
3. Nam used to live with his parents.
4. You shouldn 't talk with food in your mouth.
5. I predfer traditional dances to modern ones
6. We are usually told folk tables by our grandmother.