`-> Answer :`

`8.`

You are at school on Monday.

You aren't at school on Monday.

Are you at shool on Monday?

`9.`

David was here yeterday.

David wasn't here yesterday.

Was David here yesterday?

`10.`

Kate and Jame were late yesterday.

Kate and Jame weren't late yesterday.

Were Kate and Jame late yesterday?

`11.`

All your friends are at your party.

All your friends aren't at your party.

Are all your friends at your party?

`Go od luck!`

Đáp án:

VI.

8. You are at school on Monday.

$\to$ You aren't at school on Monday.

$\to$ Are you at school on Monday?

9. David was here yesterday.

$\to$ David wasn't here yesterday.

$\to$ Was David here yesterday?

10. Kate and Jame were late yesterday.

$\to$ Kate and Jame weren't late yesterday.

$\to$ Were Kate and Jame late yesterday?

11. All your friends were at your party.

$\to$ All your friend weren't at your party.

$\to$ Were all your friend at your party?

Giải thích các bước giải:

* Những điểm ngữ pháp được dùng đến trong bài này là:

- Công thức thì Hiện tại đơn với động từ be:

(+) S + am/ is/ are + O/...

(-)  S + am/ is/ are + not + O/...

(?) Am/ Is/ Are + S + O/... ?

- Yes, S + am/ is/ are.

- No, S + am/ is/ are + not.

Lưu ý: 

I + am

You/ We/ They + are

She/ He/ It + is

- Công thức thì Quá khứ đơn với động từ be:

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

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

(?) Was/ Were + S + O/... ?

- Yes, S + was/ were.

- No, S + was/ were + not.

Lưu ý:

- You/ We/ They + were

- I/ She/ He/ It + was

+ was not = wasn't ; were not = weren't