$1.$ My father used to smoke a lot, but now he doesn't smoke anymore.

$2.$ There used to be a big tree here, but it's no longer present.

$3.$ Lan used to get up early when she was young.

$4.$ I'm not used to driving on the left.

$5.$ He isn't used to eating Indian food; it's his first time.

$6.$ He used to stay here with us, but not anymore.

$7.$ I am not used to studying late at night; it's not difficult for me.

$8.$ She gives up going out to eat late at night. 

$----$

$-$ “used to”  `->` diễn tả những thói quen hoặc hành động trong quá khứ không còn đúng ở hiện tại.

$-$ Thì quá khứ đơn: 

$(+)$ S + V(ed)

$(-)$ S + did not + V(nguyên)

$(?)$ Did + S + V(nguyên)

$----$

$@giaitoan1234$

`@` Used to :

`( + )` S `+` used to `+` V`-`infi .

`( - )` S `+` didn't `+` V`-`infi.

`( ? )` Did `+` S `+` V`-`infi`?`

`->` Used to diễn tả hành động đã làm ở trong quá khứ như một thói quen, nhưng bây giờ không làm nữa .

`-` `-` `-` `-` `-` `-` `-` `-` `-` `-` `-` `-` `-` `-` `-` `-` `-`.

`1.`  My father used to smoke a lot, but now he doesn't smoke anymore.

`2.` There used to be a big tree here, but it's no longer present.

`3.` Lan used to get up early when she was young.

`4.` I'm not used to driving on the left.

`5.` He isn't used to eating Indian food, It's his first time.

`6.` He used to stay here with us, but not anymore.

`7.`  I am not used to studying late at night; it's not difficult for me.

`8.` She gives up going out to eat late at night.