`-` Thì quá khứ đơn với động từ ''tobe''

`+)` S + was/ were + O

`-)` S + was/ were NOT + O

`?)` Was/Were + S + N/Adj?

`*` Yes, S + was/were

`*`No, S + wasn’t/weren’t.

`->` Eg : My phone was broken yesterday.

`-` Thì quá khứ đơn với động từ thường ''V''

`+)` S + V2 + O

`-)` S + did not + V_ infinitive

`?)`  Did + S + V infinitive

`*` Yes, S + did

`*`No, S + didn’t.

`->` Eg : My family went to Sapa last month.

`-` Thì hiện tại hoàn thành :

`+)` S + have/has + V3

`-)`  S + have/has + not V3

`?)`  Have/Has + S + V3?

`->` Eg : I have already had dinner, you guys can just eat without me.

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

Ex: 

- I was a student.

- She was at home yesterday.

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, ...

EX:

- I went to Ho Chi Minh City last week.

- She used to walk to school when she was 10.

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,....

EX:

- I have lived in Ha Noi for ten years.

- Have you ever been to Da Lat?

`color{orange}{~MiaMB~}`