Вопрос по английскому языку:

2. Group the following verbs:
to run, to believe, to travel, to escape, to plan, to give, to play, to get,
to learn, to sing, to study, to enjoy, to swim, to take, to stay, to wear,
to join, to eat, to have, to hurry
1. speak-speaking ____________________________________
2. write-writing _________________________________
3. begin-beginning __________________________________
4. fly-flying ________________________________________