Bài 1: Teach-> Taught-> Taught
Buy-> Bought-> Bought
Say-> Said-> Said
Send-> Sent-> Sent
Bài 2:
Câu 1:Tim is older than other boys in his class
Tim is the oldest boy in his class
Câu 2:must we had in our howe work today?
Do we have our homework today?
Câu 3:it's dangerous to drive fast
Driving is dangerous if you ride too fast
Câu 4:mary plants vegetables in the garden
Vegetable are planted by Mary in the garden
Câu 5:catheri is older than mary
Mary isn't older than Catherine
Câu 6:we last played for our team 2 months ago
We haven't played for our team 2 months ago