Công thức thì HTHT

(+) S + has/have + V3/ed 

(-) S + has/have + not + V3/ed 

(?) Has/Have + S+ V3/ed?

DHNB: before, since + mốc thời gian, for + khoảng thời gian, yet, already, just,....

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 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 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 QKĐ (V: to be)

(+) S + was/were + ... 

(-) S + was/were + not ... 

(?) Was/Were + S ... ? 

S số ít, I, he, she, it + was

S số nhiều, you, we ,they + were

Công thức thì QKĐ (V: thường)

(+) S + V2/ed 

(-) S + didn't + V1 

(?) Did + S+ V1?

DHNB: ago, last (year, month ...), yesterday, in + năm QK, ...

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

EX1:

1. have done 

2. has written / hasn’t finished 

DHNB: for two years, yet (HTHT)

3. left / have never met

DHNB: ago (QKD) , never, since  (HTHT)

4. doesn’t watch

DHNB; once a day (HTD)

5. does / do / plays 

DHNB: every weekend (HTD)

6. will buy 

DHNB: next week (TLD)

7. has taught / graduated

HTHT + since + QKD

8. is coming

DHNB: Look! (HTTD)

9. gets / is 

DHNB: often, always (HTD)

10. Will  /earn

DHNB: tomorrow (TLD)

EX2:

1. have never watched

DHNB: never (HTHT)

2. watched

DHNB: last night (QKD)

3. is reading

DHNB: at this time (HTTD)

4. reads

DHNB: usually (HTD)

5. had

DHNB: last week (QKD)

6. am having

DHNB: at present (HTTD)

7. haven’t seen / saw 

DHNB: for a long time (HTHT), ago (QKD)

8. is ringing

DHNB: now (HTTD)

9. will meet / will bring 

DHNB: tomorrow (TLD)

10. hasn’t drunk 

DHNB: since this morning (HTHT)

`color{orange}{~LeAiFuRuiHuiBao~}`