1. He learned to drive when he was 18.
=> He has driven since he was 18
2. They haven't cleaned the street this week.
=> The street hasn't been cleaned this week
3. "You'd better not lend Mary any more money, Elizabeth" said John.
=> John advised Elizabeth not to lend Mary any more money
4. It's a pity. I don't know her telephone number.
=> I wish I knew her telephone number
5. Try to recycle things and we will save natural resources.
=> If we try to recycle things, we will save natural resources
6. I haven't eaten this kind of food before. (time)
=> This is the first time I have eaten this kind of food
7. I advise you not to eat lots of sweets. (should)
=> You shouldn't eat lots of sweets
8. Barbara plays chess better than Mike. (as)
=> Mike doesn't play chess as well as Barbara
9. It is not necessary for you to finish your assignment this evening. (need)
=> You don't need to finish your assignment this evening
10. "Don't forget to lock the house when you go out, William" his mother said. (reminded)
=> William's mother reminded William to lock the house when he went out