`11.` Was ... wasn't

`->` it : ngôi thứ 3 số ít `=>` Dùng "was"

`12.` was

`->` I : ngôi thứ nhất số ít `=>` Dùng "was"

`13.` Was ... was

`->` Sam = she : ngôi thứ 3 số ít `=>` Dùng "was"

`14.` were ... were

`->` They : ngôi thứ 3 số nhiều `=>` Dùng "were"

`15.` Were ... weren't

`->` Nina and Sam = They : ngôi thứ 3 số nhiều `=>` Dùng "were"

Bài tập 2:

`1.` Were 

`->` yesterday : DH thì Quá khứ đơn

`2.` was

`->` yesterday : DH thì Quá khứ đơn

`3.` was

`->` yesterday : DH thì Quá khứ đơn

*Cấu trúc thì Quá khứ đơn (với Tobe):

`(+)` S + was/were + C.

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

`(?)` Was/Were + S + C?

Yes, S + was/were

No, S + was/were + not

`->` He, She , It : was

I : was

You, We , They : were

Đáp án:

`-` QKĐ `:` `(` ĐT tobe `)`

`+` CKĐ `:` S + was / were + O.

`+` CPĐ `:` S + wasn't / weren't + O.

`+` CNV `:` ( Wh ) + was / were + S + O ? 

`-` Trả lời `:`

`+` CKĐ `:` Yes, S + was / were.

`+` CPĐ `:` No, S + wasn't / weren't.

`-` HTĐ `:` `(` ĐT tobe `)`

`+` CKĐ `:` S + is / am / are + O.

`+` CPĐ `:` S + is / am / are + not + O.

`+` CNV `:` ( Wh ) + is / am / are + S + O ? 

`-` Trả lời `:`

`+` CKĐ `:` Yes, S + is / am / are.

`+` CPĐ `:` No, S + is / am / are + not.

`11.`  Was `-` wasn't

`-` DHNB `:` last night

`12.`  was

`-` DHNB `:` yesterday

`13.`  Was `-` was

`-` DHNB `:` last night

`14.`  are `-` are

`-` DHNB `:` on Sunday

`15.`  Are `-` Aren't

`-` DHNB `:` this morning

Ex  `3:`

`1.`  `C`

`-` DHNB `:` yesterday

`2.`  `B`

`-` DHNB `:` yesterday

`3.`  `A`

`-` DHNB `:` yesterday