1.How long is it since they bought the house ?
⇒ When did they buy the house?

2.It's years since we decorated this room.
⇒ We haven't decorated this room for years.

3.Laurence hasn't seen his sister since she left for Japan.
⇒ Laurence last saw his sister when she left for Japan.

4.My sister has studied French fer 2 years
⇒ My sister began studying English two years ago.

5.When did Catherine and Henry get engaged?
⇒ How long have Catherine and Henry been engaged?

1. When did they buy the house ?

2. We haven't decorated this room for years.

3. Laurence last saw his sister when she left for japan.

4. My sister began studying French 2 years ago.

5. How long is it since Catherine and Henry got engaged?