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,.....

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5. The mailman is delivering the letters at 7.50 am.

6. Mrs. Thompson's son is washing his face at 7.55 am.

7. The Thompson family are eating breakfast together at 8 am.

8. Mrs. Thompson is driving her car in blue to work at 8.20 am. 

9. My classmate is skipping rope in the playground.

10. My sister is studying in an intentional school. 

`color{orange}{~MiaMB~}`

Đáp án `+` Giải thích các bước giải

`5.` The mailman is delivering the letters at 7.50 am

`6.` Mrs.Thompson's son is washing his face at 7.55 am

`7.` The Thompsons family are eating breakfast together at 8 am

`8.` Mrs.Thompson is driving her car in blue to work at 8.20 am

`9.` My classmate is skipping rope in the playground

`10.` My sister is studying in an international school

`→` Công thức HTTD

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

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

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