`9.` Trang is going to school by bike.

`-` Ta có: Ride a bike `=` Go by bike `:` Đi xe đạp ...

`-` Cấu trúc: S `+` go/travel `+` ... `+` by `+` tên phương tiện

`=>` Tạm dịch: Trang đang đi học bằng xe đạp.

`10.` Huyen goes to school on foot every afternoon.

`-` Ta có: Walk `=` Go on foot (v): Đi bộ.

`11.` Are there forty students in your class`?`

`-` Cấu trúc: Do/Does `+` S `+` have `+` N `+` ... `?`

`=` Are/Is there `+` S `+` N `+` ... `?`

`12.` Does your father go to work by bicycle`?`

`-` Ta có: Cycle `=` Go by bicycle (v): Đạp xe ...

9. Trang is going to school by bike.

→ ride the bike to ...= go to ... by bike: đi xe đạp tới ...

10. Huyen goes to school every afternoon on foot.

→ walk to ... = go to ... on foot: đi bộ tới

11. Are there forty students in your class?

→ Do/does + S + have + number + N (số nhiều)

⇔ Are there + number + N (số nhiều) + in ...

12. Does your father go to work by bike?

→ cycle to ... = go to ... by bike: đi xe đạp tới ...