Divide the verbs into 2 columns.
The verbs: to teach, to believe, to spend, to watch, to travel, to do, to visit, to fox, to lock, to sing, to leave, to mix, to smile, to punch, to go, to freeze, to match, to know, to jump, to scratch, to speak, to crash, to close, to catch, to take, to wish, to live, to wash, to bake, to fix, to search.
The ending -S The ending -ES
The verbs: to spy, to play, to carry, to buy, to try, to say, to cry, to stay, to worry, to pay, to hurry up, to study, to lay, to marry, to enjoy
Y I Y Y