`26`.The students ought to do their homework carefully

`\rightarrow` Cấu trúc : S + ought to do sth

`27`.Mai has to do the chores himself today

`\rightarrow` S + have / has / ... + to V : Bắt buộc làm điều gì đó

`28`.The teacher told me to clean the blackboard

`\rightarrow` Câu mệnh lệnh : S + asked / ordered / ... + O + ( not ) + to V

`29`.She is not old enough to be in my class

`\rightarrow` Enough : S + be / be not + adj + enough ( for O ) + to V

`30`.Could you tell me how to study English ?

`\rightarrow` ĐT đi sau could vẫn giữ nguyên

`\text{@ TheFox}`