Giúp mình phần này với, cảm ơn ạ

Công thức used to : đã từng 

(+) S + used to + V1 

(-) S + didn't use to + V1

(?) Did + S+ use to + V1?

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1. didn't use

2. used

3. didn't use 

4. didn't use

5. Did you 

6. Did he use 

7. Did your dad use 

`color{orange}{~STMIN~}`

`1.` didn't use

`2.` used

`3.` didn't use 

`4.` didn't use

`5.` Did you 

`6.` Did he use 

`7.` Did your dad use 

`-` S + used to + V-inf + O ... : Ai đó từng làm gì trong quá khứ nhưng đã bỏ ...