$1$ `:` I do my homework.

`->` I am doing my homework at the moment.

$2$ `:` She doesn't go to school.

`->` She isn't going to school now.

$3$ `:` They eat their meal.

`->` They're eating their meal.

$4$ `:` Where do you live ?

`->` I live in _________ ( Nơi bạn đang sống ).

`***` HTTD `:`

`(+)` S `+` am / is / are `+` V`-`ing `+` O.

`(-)` S `+` am / is / are `+` not `+` V`-`ing `+` O.

`(?)` Am / Is / Are `+` S `+` V`-`ing `+` O ?

`1.` I do my homework

`→` I am doing my homework at the moment.

`2.` She doesn't go to school

`→` She isn't going to school now.

`3.` They eat their meal

`→` They're eating their meal.

`4.` Mai doesn't eat an orange

`→` Mai isn't eating an orange now.

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

Công thức :

Khẳng định :

S + am/ is/ are + V-ing

Phủ định :

S + am/ is/ are + not + V-ing

`#`$Gin$