Công thức thì HTTD 

(+) S + am/is/are + Ving 

(-) S + am/is/are + not + Ving 

(?) Am/Is/Are +S +Ving? 

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

Công thức thì TLĐ

(+) S + will + V1 

(-) S + won't + V1 

(?) Will + S+ V1? 

DHNB: in the future, in + năm ở TL, in + time, next week, next year, ....

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,....

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Should + S+ V1? ai nên làm gì ?

Would + S + like + to V / N ?

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What : cái gì 

When: khi nào 

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1. What are her friends doing now?

2. When will they join an English Club?

3. What does Thu do after school?

4. What should he do to stay healthy?

5. What would you like to eat for lunch?

`color{orange}{~LeAiFuRuiHuiBao~}`