1. He is not (enough old to/ old enough to/ enough old for/ old enough for) get married.
2. Would you like (to leave/ leave/ leaving/ left) a message?
3. I used to (watch - watching - watches – watched) that film when I was ten.
4. What about (have – to have – having – had) fruits?
5. You ought (wash – to wash – washing – washed) your hands before meals.
6. It has taken me 3 hours (to copy- copy – copying- copied) this document.
7. It’s interesting for us (to join – joins – join – joining).
8. He told me (to keep – keep – kept – keeping) the news secret.
9. I enjoy (singing –sing – sang – to sing) very much.
10. Would you mind (open – to open – opening – opened) the door?
11. The sad movie made me (cry – to cry – crying – cried).12. Do you mind (open – to open – opening – opened) the door?