`I`

`A)`

`1.` tidied

`2.` didn't tidy

`3.` Did your sister tidy

`=>` yesterday là `DHNB`

`B)`

`1.` lived

`2.` didn't live

`3.` Did you live

`=>` last summer là `DHNB`

`C)`

`1.` talked

`2.` didn't talk

`3.` Did Sandra and Elsa talk

`=>` last night là `DHNB` 

`II`

`1.` waited

`2.` invited

`3.` didn't live

`=>` one year ago là `DHNB`

`4.` Did you like

`=>` last night là `DHNB`

`5.` didn't visit

`6.` Did your grandparents dance

`7.` stopped

`8.` didn't water

`=>` yesterday là `DHNB`

`9.` didn't study

`10.` rained

`=>` last night là `DHNB`

`11.` Did she try

`12.` ended

`=>` yesterday là `DHNB`

`13.` walked

`=>` last month là `DHNB`

`14.` washed

`15.` didn't work 

`=>` Vế sau có was là `DHNB`

`---------------->`

`=>` Cấu trúc thì Quá khứ đơn với động từ thường

`( + )` S + V2/-ed + O

`( - )` S + didn't + Vo ( động từ nguyên mẫu ) + O

`( ? )` Did + S + V + O?

A)

1. tied               vì có từ yesterday chỉ quá khứ

2.didn't tidy

3. Did- tiddy

B)

1.lived             "last": quá khứ

2. didn't live

3.Did- live

C) vì đầu bài cho sẵn chia hết ở quá khứ nên ta chỉ việc đúng từ thôi

S+Ved..........

S+ didn't + V......

1. waited

2. invited

3. didn't live  

4.did-like           

5.didn't visit

6.did-dance

7. stopped

8. didn't water

9.didn't studyed

10.rained

11.did-tried

12.ended

13.walked

14.washed

15.didn't work