Exercise 1 :

1. was (mẫu)

2. wasn't (mẫu)

3. Vì messy là lộn xộn nên ta chọn : 3. was

4. was (Dad là 1 người và trong tranh mặt ông ấy đang tức giận)

5. Mik ko nhìn rõ cái bánh có trên ghế ko nhưng nếu có thì bn điền : was (số ít) còn ko thì bn điền " : wasn't (cũng số ít) (chair ko có s/es thì là số ít)

6. Balloons là số nhiều điền : were 

7. Mom là 1 người, số ít điền : was

8. Neat là gọn gàng, bedroom ko s/es cũng là số ít, điền : was

Exercise 2 : 

1. were (mẫu)

2. Jay là số ít, trong tranh Jay (cũng bị ướt, hoặc ko), có (ướt) điền : was, ko (ướt) điền : wasn't

3. Beth và Celia là 2 người số nhiều, điền : were

4. Ducks là số nhiều, điền : were 

5. Mom số ít, điền : was

Exercise 3 : 

1. Wasn't (She là was/wasn't) (mẫu)

2. Weren't (You là were/weren't)

3. Weren't (They là were/weren't)

4. Wasn't (He là was/wasn't)

5. Weren't (We là were/weren't)

~~~ Chúc bn học tốt ~~~

`I.`

`3.` was

`4.` was

`5.` was

`6.` were

`7.` was

`8.` was

`II.`

`2.` was

`3.` were

`4.` were

`5.` was

`III.`

`2.` weren't 

`3.` weren't 

`4.` wasn't  

`5.` weren't 

`===============`

`+` Cấu trúc thì Quá Khứ Đơn:

`-` Động từ tobe:

`(+)` S + was/ were + O

`(-)` S + was/ were + not + O

`(?)` Was/ were + S + O.?

`-` I/ He/ She/ It/ N số ít + was

`-` We/ You/ They/ N số nhiều + were

`@`

`-` There was + N số ít: có

`-` There were + N số nhiều: có