`1` have learned

`-` HTHT since QKĐ

`->` HTHT: S + have/has + V3/ed

`2` was destroyed

`-` QKĐ, dấu hiệu: last week

`->` Bị động: S + was/were + V3/ed + (by O)

`3` is knocking

`-` HTTD, dấu hiệu: Listen!

`->` S + am/is/are + Ving

`4` to wear

`-` wh + to V

`5` using

`-` S + suggest + Ving: đề nghị làm gì

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 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,.....

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

1. have learnt

HTHT +since + QKĐ

2. was destroyed 

DHNB: last week (QKD)

S + was/were + V3/ed (bị động)

3. is knocking 

DHNB: Listen! (HTTD)

4. to wear 

Wh + to V

5. using 

S + suggest + Ving: đề nghị

`color{orange}{~LeAiFuRuiHuiBao~}`