`a ) ( + )` They like to hang out during weekdays.

      `( ? )` Do they like to hang out during weekdays?

`b ) ( - )` The Earth doesn't revolve around the Sun.

     `( ? )` Does The Earth revolve around the Sun?

`c ) ( - )` She doesn't only eat fish.

    `( ? )` Does she only eat fish?

`- -` Hiện tại đơn `- -`

`( + )` S + `V_0``/``V_s``/``V_(es)` + O
`( - )` S + Don't/Doesn't + `V_0` + O

`( ? )` Do/Does + S + `V_0` + O?

`- - - - - - - - - - - - - `

$\text{@Tnhye@}$

`a`)
(`+`) They like to hang out during weekdays.
(`?`) Do They like to hang out during weekdays `?`
-----------------------------------
`b`)
(`-`) The Earth doesn't revolve around the Sun
(`?`) Does the Earth revolve around the Sun `?`

----------------------------------------
`c`)
(`-`) She doesn't only eat fish
(`?`) Does she only eat fish `?`
----------------------------------
 `->` Cấu trúc của thì Hiện tại đơn:
(`+`) `S` + `V`(`s`/`es`)+ `O`
(`-`) `S` + `don't`/`doesn't` + V(s/es)+O
(`?`) Do/does+S+V_inf+O
`@` Note
`@` Đối với He/she/it/danh từ số ít+V(s/es)/doesn't
`@` Đối với I/we/they/you/danh từ số nhiều+V_inf/don't