1. He often went fishing when he was young.

→ He used to go fishing when he was young

2. They started to study E in 2000

→ They have studied E since 2000.

3. He climbed the tree because he wanted to get a better view

→ He climbed the tree so as to get a better view

4. The last time I played tennis was in 1990

→ I haven't played tennis since 1990

5. Nobody has used this room for years 

→ This room hasn't been used for years

6. "What are you going to do tonight?" Mai asked

→ Mai asked what I was doing that night

7. "When will you come and visit me ?" Nam asked

→ Nam asked when I would come and visit him.

1. He used to go fising when he was young. 

2. They have studied E since 2000.

3. He climbed the tree so as to get a better view.

4. I haven't played tennis since 1990.

5. This room hasn't been used for years.

6. Mai asked what I was doing that night.

7. Nam asked if I would come and visit him.