thì HTĐ 

S + vs/es

1 they don't have to learn new words

do they have to learn new words

thì QKĐ 

2 he didn't have to clean the floor yesterday 

did he have to clean the floor yesterday 

thì HTHT 

-> S + have / has + VPII 

-> homework ko đếm đc nên đi với much

3 they haven't got much homework

have they got much homework

thì HTĐ

4 mrs lan doesn't have to cook meals for the children 

does mrs lan  have to cook meals for the children 

thì HTHT + since 

-> s + have / has + VPII + since + 1 mốc thời gian

5 i haven't played piano since 6 o clock

have i played piano since 6 o clock 

6 nga doesn't have to writte letter to her mum

does nga have to writte letter to her mum

7 they have their mom doesn't make them drink

do they have their mom make them drink

(-) → negative ; (?) → interrogative

1 They have to learn new words

(-) They don't have to learn new words

(?) Do they have  to learn new words ?

* cấu trúc thì hiện tại đơn với động từ thường

(+) S + V(s/es) + ....

(-) S + don't / doesn't + V-nguyên thể + ...

(?) Do / Does + S + V-nguyên thể + ...

2 He had to clean the floor yesterday

(-) He didn't have to clean the floor yesterday

(?) Did he have to clean the floor yesterday ?

* Cấu trúc thì quá khứ đơn với động từ thường:

(+) S + Ved/PII + ...

(-) S + didn't + V-nguyên thể

(?) Did + S + V-nguyên thể

3 they have got much homework

(-) They haven't got much homework

(?) Have they got much homework ?

* Cấu trúc thì HTHT

(+) S + have/has + PP + ..
(-) S + haven't / hasn't + PP

(?) Have/Has + S + PP 

4 Mrs Lan has to cook meals for the children

(-) Mrs Lan doesn't have to cook meals for the children

(?) Does Mrs Lan have to to cook meals for the children ?

* cấu trúc như câu 1

5 I have played the piano since 6 o'clock

(-) I haven't played the piano since 6 o'clock

(?) Have I played the piano since 6 o'clock ?

* Cấu trúc như câu 3

6  Nga has to write letter to her mum

(-) Nga doesn't have to write letter to her mum

(?) Does Nga has to write letter to her mum ?

* cấu trúc câu như câu 1 

7  They have their mom make them drink

(-) They have their mom don't  make them drink

(?) Do they have their mom make them drink ?

* cấu trúc như câu 1

>>>> good luck<<<<