Question

Англ мова 
WB Ex 9 page 41 
Пример : To be - was , 
To want - ..., To make -..., to try - ..., to clean-..., to keep- ..., to agree - ..., to forget - ...,

Answer 1

To want-wanted;to make-made;to try-tried;to clean-cleaned;to keep-kept;to agree-agreed,to forget-forgot(третья форма в Perfect-forgotten)