Công thức thì HTĐ (V: thường)

S số ít, he, she, it 

(+) S + Vs/es

(-) S+ doesn't + V1 

(?) Does +S +V1?

S số nhiều, I, you, we, they

(+) S + V1 

(-) S+ don't + V1 

(?) Do + S+ V1? 

DHNB: always, usually, sometimes, often, never, seldom,....

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

How often + trợ động từ + S + V1? hỏi tần suất

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

2.

How often does she have Maths?

She has it four times a week.

3.

How often does he have Vietnamese?

He has it every day.

4.

How often do they have IT?

They have it twice a week.

5.

How often do you have Music?

I have it once a week

`color{orange}{~STMIN~}`