Vamos ver essas frases abaixo :
1.I can play/ to play the guitar .
2.I like to watch / watch sports on TV.
3.I enjoy listening / to listen to music.
4.I am good at learning/ learn new languages .
Correct form : 1. I can play / 2. I like to watch ./ 3. I enjoy listening ./ 4. I am good at learning