24 Nam often washes the dishes for his mother
=>Nam often helps his mother wash the dishes
vì sau V chính là helps(chia theo HTĐ} thì ko chia nx
25 My parents are at work, so I have to take the bus to school
theo cấu trúc because ->so
26. Where do you come from?
HTĐ: where + do/does + S + come from? = where + am/is/are + S + from?