Ответ:

2. My brother love watching the Olympic Games on TV.

3. We hate swimming in the sea.

4. Sonia don't mind practising every day.

5.David like snowboarding in winter.

6. I don't like doing my homework at the weekend.

после слов love, like, hate и тд употребляем герундий -ing.

Ответ:

2. loves, watching

3. hate, swimming

4. doesn't mind, practising

5. does david, like / enjoy

6. don't like, doing