1. "You'd better not lend that man any more money, Mary" - said John.
⇒ John advised Mary not to lend that man any more money.
2. We last visited Ho Chi Minh city 3 years ago.
⇒ We haven’t visited Ho Chi Minh city for 3 years.
3. The bookshelf was so high that the children couldn’t reach it.
⇒ The bookshelf was too high for the children to reach.
4. May I carry your bag?
⇒ Would you mind carrying thi bag for you?
5. It’s such a pity your sister isn’t here.
⇒ If only your sister isn’t here as well.
6. His parents made him study hard for his exam.
⇒ He was made to study hard for the exams.
7. Nobody use this house very often.
⇒ This house isn't used very often.
8. How long is it since they bought the house?
⇒ When did they buy the house?
9. The last time it rained here was a fortnight ago.
⇒ It hasn’t rained here for a fortnight.
10. The girl is drawing on the board. She is my sister
⇒ The girl, who is drawing on the board, is my sister.