`1.` Shall we go to visit her`?`

`-` Shall we `+` V`-`infi? [Dùng để gợi ý làm việc gì?]

`2.` I spend `30` minutes going to school by bike.

`-` S `+` take(s) `+` O `+` time `+` to V`-`infi

`=` S `+` spend(s) `+` time `+` V`-`ing

[Dành bao nhiêu thời gian làm gì]

`3.` She is not young enough to have anymore children.

`-` S `+` tobe not `+` adj `+` enough `+` to V`-`infi: Quá để làm gì..

`4.` When did you start buying your dictionary`?`

`-` How long `+` have`/`has `+` S `+` Ved`/`Vc3`/`been `+` V`-`ing

`=` When did `+` S `+` start`/`begin `+` to V`/`V`-`ing`?`

`5.` Winter is the coldest of the year.

`-` SSN: S `+` tobe `+` the most adj`/` the adj`-`est .....

`7.` It takes Ha `20` minutes to write a letter to his friend.

`-` S `+` take(s) `+` O `+` time `+` to V`-`infi

`=` S `+` spend(s) `+` time `+` V`-`ing

[Dành bao nhiêu thời gian làm gì]

`8.` My uncle is too generous to lend someone money.

`-` S `+` tobe `+` too `+` adj `+` to V`-`infi

[Quá để làm gì]

`9.` We used to swim in the river when we were small.

`-` S `+` used to `+` V`-`infi: Diễn tả thói quen trong quá khứ.