1.We started living here fifteen years ago.
-> We have lived here for fifteen years
2.Trung's parents gave him a microcomputer on his birthday.
-> Trung  was given a micorcomputer by his parents on his birthday
3.He is too old to have more children.
-> He is so old that he can't have more children
4. Their teacher is making them to study hard.
-> They are made to study hard by their teacher
5. It is ages since Alan visited his parents.
->Alan hasn't visited his parents for ages.
6.Peter failed the exam because he was lazy.
->Because of his laziness, Peter failed the exam
7. Please don' t play your music loudly.
->Would you mind not playing your music loudly