$1.$ They are in the same class as us.

- the same as: giống với.

- S + to be + ...

$2.$ He has played tennis since he was ten.

- S + have/ has + V (Pii).

- since + mốc thời gian.

$3.$ What time did you finish your homework last night?

- What time: hỏi thời gian cụ thể.

- "last night": mốc thời gian trong quá khứ.

$→$ S + V (-ed/ bất quy tắc).

$4.$ He is the most intelligent student in my school.

- So sánh nhất với tính từ dài: S + tobe + the + most + adj + $($N$)$.

$5.$ All the homework has to be completed tonight.

- Câu bị động với động từ khuyết thiếu (Have to): S + have/ has + to + be + V (P_II) + (by O).

`1` They are in the same class as us (the same + N + as)

`2` He has played tennis since he was ten

`+` He là chủ ngữ số ít nên dùng has

`->` Cấu trúc : S + have/has + Vpp

`3` What time did you finish your homework last night?

`+` Chia thì QKĐ `-` DHNB : last night

`->` Cấu trúc : WH_Q + do/does + S + V-inf ?

`4` He is the most intelligent student in my school

Áp dụng cấu trúc so sánh nhất , ta có

`->` Nếu từ chỉ có 1 âm tiết: the + ADJ/ADV + -est

`->` Nếu từ có 2 âm tiết trở lên: the + most + ADJ/ADV

`5` All the homework has to be completed tonight

`->` Cấu trúc : S + have/has + to + be + Vpp + (by + O)