`***` Cách dùng 'have to' (phải làm gì):

`(+)` S + have/has to + V-inf

`(-)` S + don't/doesn't + have to + V-inf

`(?)` (WH-) + do/does + S + V-inf?

`-` 'have, don't, do' dùng với I/we/you/they/N số nhiều

`-` 'has, doesn't, does' dùng với He/she/it/N số ít

`------------`

`1.` has to

`2.` have to

`3.` Does he have to

`4.` have to

`5.` don't have to

have to: phải làm gì 

(+) S + has/have + to + V1 

(-) S + do/does + not + have to + V1

(?) Do/Does + S + have to + V1? 

S số ít, he, she, it --> đi với has / does

S số nhiều, you, we, they ,I --> đi với have / do 

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1. has to 

2. have to 

3. Does / have to

4. have to 

5. don't have to 

`color{orange}{~MiaMB~}`