Công thức thì HTĐ (V: tobe)

(+) S + am/is/are ..

(-) S + am/is/are + not .. 

(?) Am/Is/Are + S + ... ? 

I + am

S số ít, he, she, it + is

S số nhiều, you ,we, they + are

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,....

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,.....

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1. is running

DHNB: Sit down! (HTTD)

2. buys 

DHNB: often (HTD)

3. aren't drinking

DHNB: at the moment (HTTD)

4. are climbing

DHNB: Look! (HTTD)

5. is crying

DHNB: now (HTTD)

6. wear

DHNB: always (HTD)

7. are you doing

8. eat

DHNB: never (HTD)

9. sets off

DHNB: every fifteen minutes + lịch trình, kế hoạch (HTD)

10. aren't going

DHNB: tonight (HTTD)

`color{orange}{~LeAiFuRuiHuiBao~}`