`1`. is buying

`2`. is not buying 

`3`. Is she running

`4`. is eating

`5`. are you waiting

`6`. are not crying

`7`. are having

`8`. are traveling

`9`. is drinking

`10`. is speaking

`Gthich`:

`-` Cấu trúc HTTD:

`(+)` S+tobe+V-ing+O

`(-)` S+tobe not+V-ing+O

`(?)` Tobe+S+V-ing+O?

`-` Dấu hiệu nhận biết :  at the momment, now, at present,...

`-` He/she/it + is

`-` We/you/they + are

`-` I + am

`color{blue}{Rosie256}`

Công thức thì HTTD 

(+) S + am/is/are + Ving 

(-) S + am/is/are + not + Ving 

(?) Am/Is/Are +S +Ving? 

I + am

S số ít, he, she, it + is

S số nhiều, you ,we, they + are

DHNB: now, right now, (!), at present, at the moment,.....

--------------------------------------------------------------------

1. is buying

2. isn't studying

3. Is she running

4. is eating

DHNB: now 

5. are you waiting

6. aren't trying

7. are having

DHNB: right now 

8. are travelling

DHNB: now 

9. is drinking

10. is speaking

DHNB: Listen! 

`color{orange}{~LeAiFuRuiHuiBao~}`