(-) → 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<<<<
