Напишите слова в трёх формах и разделите их на две группы.to

Напишите слова в трёх формах и разделите их на две группы.

to be, to laught, to built, to study, to become, to happen, to burn, to discribe, to read, to look, to lead, to count, to come, to work, to keep, to join, to learn, to take, to say, to wake up, to go, toget, to know, to hear,to do.