Cấu trúc Thì QKĐ :

`-` CKĐ : `\text{S + Ved / V2}`

`-` CPĐ : `\text{S + didn't + V}`

`-` CNV : `\text{Did + S + V ?}`

`1`.read

`2`.understood

`3`.swam

`4`.knew

`5`.began

`6`.flew

`7`.lent

`8`.came

`9`.did

`10`.sang

`11`.fell

`12`.was

`13`.took

`14`.got

`15`.stood

`\text{@ TheFox}`

Đáp án:

`1.` read

`-` Dấu hiệu nhận biết "last week"

`2.` understood

`3.` swam

`-` Dấu hiệu nhận biết "last weekend"

`4.` knew

`5.` began

`6.` lent

`7.` came

`8.` did

`9.` sang

`10.` fell

`11.` was

`12.` took      `13.` got       `14.` stood

`-` Cấu trúc Thì QKĐ:

(+) S + Ved/V2..

(-) S + didn't + V-inf..

(?) Did + S + V-inf..?

`-` Đối với tobe:

(+) S + was/ were,,,

(-) S + was/ were + not..

(?) Was/Were + S..?

`+` Dấu hiệu nhận biết: 

- yesterday, last (week,month,weekend....), when + mệnh đề chia thì quá khứ đơn: khi (when I was a kid,…), at, on, in… (at 6 o’clock, on Monday, in June,…), ago(cách đây).....