`1.` We always go to school on time
`->` Dấu hiệu: always
`->` HTĐ
`->` S + V(s,es)
`2.` How many hours does he often works a week?
`->` How many + danh từ đếm được số nhiều + .... (are there)?
`3.` American students don't often wear uniforms at school.
`->` Dấu hiệu: often
`->` HTĐ
`->` S + do/does + not + V + ...
`5.` I like math because it is interesting.
`->` Sắp xếp sao cho hợp nghĩa
`6.` What subject does tom like best?
`->` What + trợ động từ + S + ...?
`7.` We want to work with you
`->` S + want +to V
`8.` Excuse me! Is there a post office near here?
`->` Sắp xếp sao cho hợp nhĩa
`9.` Mai is interested in doing experiments.
`->` S + tobe + interested in + V_ing
