`-` `\text{S + used to + V :}` Đã từng

`-` `\text{S + didn't use to + V :}` Không từng

`-` `\text{Did + S + use to + V ? :}` Đã từng `?`

`1`.Did you use to go to the beach when you lived in Nha Trang ?

`2`.Linda used to live with her parents

`3`.I used to have time to collect stamps as when I was in primary school

`4`.He used to be a poor man

`5`.They didn't use to go to the cinema every Sunday last year

`6`.In the past my hair used to be short

`7`.I used to stay up late to watch football matches last year

`\text{@ TheFox}`

$\text{1.}$ Did you use to go to the beach when you lived in Nha Trang . 

$\text{2.}$ Linda used to live with her parents . 

$\text{3.}$ I used to collect stamps when I was in primary school . 
$\text{4.}$ He used to be a poor man , but now he is a rich businessman . 

$\text{5.}$ They didn't use to go to the cinema every Sunday last year . 

$\text{6.}$ In the past my hair used to be short  . 

$\text{7.}$ I used to stay up late to watch foor matches last year , but now I don't .

→ S + used to + V-inf + O 

→ S + didn't + use to + V-inf + O 

→ Did + S + use to + V-inf + O ? 

→ used to diễn tả 1 sự việc hay 1 hành động nào đó xảy ra trong quá khứ nhưng nay đã chấm dứt hoàn toàn 

$#Keisha$