1.They want to cut down all the old trees.
=> They want all the old trees cut down.
2.Would you mind if i didn't tidy the mess?
Is it okay for me not to tidy the mess?
3.It's the second time she has visited California
=> She's visited California twice.
4.All my suits were made in London( had)
=> I had all my suits made in London
5.This is the most interesting novel i have ever read( such)
=> I have never read such an interesting novel before.
6.He isn't going sailing in Huong river with his friends next weekend(of)
=> He's not going sailing in Huong river with the friends of his next weekend.
7.The man wanted to know more about the accident. He asked a lot of people( V-ing)
=> Wanting to know more about the accident, he asked a lot of people.
8.She both sings well and dances beautifully
=>Not only does she sing well but also she dances beautifully.
9.We were never bitten by bees(used)
=> We're used to not being bitten by bees.
10.It's essential for him to stop smoking in the office( that)
=> It's necessary that he must stop smoking in the office.