`-` Thì QKĐ ( ĐT Tobe ) :

`+` PĐ : S + wasn't / weren't + adj / n

`+` NV : Was / Were + S + adj / n ?

`=>` `DHNB` : ago , last , yesterday , in + Mốc thời gian trong Quá khứ , ...

`=>`

`+` I , He , She , It `+` was

`+` You , We , They `+` were

`1`.

`( - )` She wasn't tired last night

`( ? )` Was she tired last night ?

`2`.

`( - )` I wasn't in London last month

`( ? )` Were you in London last month ?

`3`.

`( - )` They weren't at Nina's house yesterday 

`( ? )` Were they at Nina's house yesterday ?

`4`.

`( - )` She wasn't with him yesterday

`( ? )` Was she with him yesterday ?

`5`.

`( - )` Tom wasn't at school last Monday

`( ? )` Was Tom at school last Monday ?

`\text{# TF}`

`1. ( - )` She wasn't tired last night.

`( ? )` Was she tired last night?

`2. ( - )` I wasn't in London last month.

`( ? )` Were you in London last month?

`3. ( - )` They weren't at Nina's house yesterday.

`( ? )` Were they at Nina's house yesterday?

`4. ( - )` She wasn't with him yesterday.

`( ? )` Was she with him yesterday?

`5. ( - )` Tom wasn't at school last Monday.

`( ? )` Was Tom at school last Monday? 

`-` Cấu trúc thì QKD với tobe:

`( + )` S (số ít + I, he,she,it) + was+ N/adj/... + O

S (số nhiều + you, we, they) + were + N/adj/... + O

`( - )` S (số ít + I, he, she, it) + wasn't + N/adj/... + O

S (số nhiều + you, we, they) + weren't + N/adj/... + O

`( ? )` Was+ S (số ít + I, he, she, it) + N/adj/... + O?

Were + S (số nhiều + you, we, they) + N/adj/... + O?