1)

TO BE - WAS/WERE - SER/ESTAR

TO BEGIN - BEGAN - COMEÇAR

TO BUY - BOUGHT - COMPRAR

TO BRING - BROUGHT - TRAZER

TO CUT - CUT - CORTAR

TO DRINK - DRANK - BEBER

TO WRITE - WROTE - ESCREVER

TO SLEEP - SLEPT - DORMIR

TO READ - READ - LER

TO UNDERSTAND - UNDERSTOOD - ENTENDER

2)

a. When we went to the beach we slept in the tent.

b. They were students. They did well at school.

c. My parents ate dinner at 7 P.M.

d. My father felt exhausted after work.