`33.` Mrs. Brown told Peter not to go to the park when it got dark.
Giải thích: told sb (not) to V: yêu cầu ai (không) làm gì.
`34.` We have learned Chinese for four years.
Giải thích: S + started + to V/Ving + khoảng thời gian + ago = S + have/has + Vpp + for + khoảng thời gian.
`35.` Although they were old, they worked very hard.
Giải thích: Although + mệnh đề = In spite of/Despite + N/V-ing
`36.` John doesn't work as carefully as Tom does.
Giải thích: S1 + V + as + adv + as + S2.
@ `Ly`
