1.They have just sold that old house.

⇒The old house has just been sold.

2.It was such a hard cake that I couldn’t eat it.

⇒The cake is too hard for me to eat it.

3.I last heard this song ten years ago.

⇒It is ten years since I last heard this song.

4.It was a  two- hour flight from Hanoi to Ho Chi Minh city.

⇒It took me two hours to fly from Hanoi to Ho Chi Minh city.

5.We don’t have enough money, so we can’t buy that house.

⇒If we had enough money, we could buy that house.

6.Although he took a taxi, Bill still arrived late for the concert.

⇒Despite taking a taxi, Bill still arrived late for the concert.

7.” Where does your brother work?” she asked me

⇒She asked me where my brother worked.

8.I haven’t seen Liz for six months.

The last time I saw Liz was six months ago.

9.Study harder or you won’t pass the exam.

⇒If you don't study harder, you won't pass the exam. 

10.Hoa went to bed early because she was tired.

⇒Hoa was tired, so she went to bed early.

1.The old house has just been sold

2.The cake was so hard that I couldn't eat it

3.It is ten years since I last heard this song

4.It took two hours to fly from Hanoi to Ho Chi Minh City

5.If we have enough money , we can by that house

6.Despite taking a taxi , Bill still arived late for the concert

7.She asked me where my brother worked

8.The last time I didn't see Liz six months ago  

9.If you study harder , you will pass the exam

10.Hoa was tired , so she went to bed early

*Cấu trúc : S + asked + tân ngữ + Wh-Qs + S + V(lùi thì)....

                  If + S + V(s/es) , S + will/can + Vinf...