Some verbs and adjectives can be followed by either an -ing form or an infinitive. In some cases, there is a difference of meanings. Some verbs and adjectives are usually followed by infinitives. There are also some verbs or adjectives that can only be followed by ing forms.
Answers
1. He insisted on being paid at once.
2. I don’t like the idea of getting old.
3. I am not very good at dancing.
4. I was interested to learn that my ancestors were from Burma.
5. I don’t think they mean to get married for the moment.
6. If you want to pass the test that will mean working hard.
7. I’m beginning to understand things better.
8. I am not accustomed to live / to living alone.
9. We are still waiting for them to arrive.
10. They are talking about moving to the country.
11. They repaired the roof instead of going on holiday.
12. I regret quitting my job. It was a big mistake.

