$\begin{array}{c} \color{#db1616}{\texttt{#NUyen}} \end{array}$

`a,`

`(-)` They don't often cycle to work

`(?)` Do they often cycle to work?

`b,`

`(-)` He did not walk to work last week

`(?)` Did he walk to work last week?

`c,`

`(-)` I don't always get up early

`(?)` Do you always get up early?

`d,` 

`(-)` They didn't hold a flower festival in Da Lat last year

`(?)` Did they hold a flower festival in Da Lat last year?

`-----`

`@` HTĐ

`(+)` S + V(s/es)

`(-)` S + do/does + not + V(bare) + O

`(?)` Do/does + S + V(bare) + O?

`@` QKĐ

`(+)` S + V(ed/qk)

`(-)` S + didn't + V(bare) + O

`(?)` Did + S + V(bare) + O?

`1.`

`(+)` They often cycle to work.

`(-)` They don't often cycle to work.

`(?)` Do they often cycle to work?

`2.`

`(+)` He walked to work last week.

`(-)` He didn't walk to work last week.

`(?)` Did he walk to work last week?

`3.`

`(+)` I always get up early.

`(-)` I don't always get up early.

`(?)` Do you always get up early?

`4.`

`(+)` They held a flower festival in Da Lat last year.

`(-)` They didn't hold a flower festival in Da Lat last year.

`(?)` Did they hold a flower festival in Da Lat last year?

`=>` Thì HTĐ:

`(+)` S + V(s/es)

`(-)` S + don't/doesn't + V(bare)

`(?)` Do/Does + S + V(bare)?

`->` Lưu ý:

`+` S = He/She/It/N số ít/N không đếm được + V(s/es) `/` doesn't + V(bare)

`+` S = I/You/We/They/N số nhiều + V(bare) `/` don't + V(bare)

`=>` Thì QKĐ:

`(+)` S + V2/ed

`(-)` S + didn't + V(bare)

`(?)` Did + S + V(bare)?