infinitive = to + a verb
1.) to talk
2.) to leave
3.) to see
4.) to pay
5.) to tell
6.) to bake
7.) to have
8.) to go
9.) to eat
10.) to be
11.) to help
12.) to give
13.) to take
14.) to get
15.) to exercise
16.) to travel
17.) to buy
18.) to try
19.) to become
20.) to sell