`-` Thì QKĐ :

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

`+` NV : Did + S + V ? `-` Was / Were + S + adj / n ?

`=>` `DHNB` : ago , last , yesterday , ...

`1`.

`( - )` Nam didn't write an essay in Literature class this morning

`( ? )` Did Nam write an essay in Literature class this morning ?

`2`.

`( - )` I didn't watch TV yesterday morning

`( ? )` Did you watch TV yesterday morning ?

`3`.

`( - )` Nam and you weren't in the English club last Tuesday ?

`( ? )` Were Nam and you in the English club last Tuesday ?

`4`.

`( - )` They didn't eat noodles two hours ago

`( ? )` Did they eat noodles two hours ago ?

`5`.

`( - )` We didn't always have a nice time on Christmas holiday in the past

`( ? )` Did you always have a nice time on Christmas holiday in the past ?

`6`.

`( - )` My father didn't decorate the Christmas tree

`( ? )` Did my father decorate the Christmas tree ?

`7`.

`( - )` She didn't buy a new dress yesterday

`( ? )` Did she buy a new dress yesterday ?

`8`.

`( - )` They weren't late for school

`( ? )` Were they late for school ?

`9`.

`( - )` Mr.Tam didn't take his children to the museum last Sunday

`( ? )` Did Mr.Tam take his children to the museum last Sunday ?

`10`.

`( - )` Hoa didn't make a cushion for her armchair 

`( ? )` Did Hoa make a cushion for her armchair ?

`\text{# TF}`

`1` Nam didn't write an essay in Literature class this morning

+) Did Nam write an essay in Literature class this morning?

`2` I didn't watch TV yesterday morning

+) Did you watch TV yesterday morning?

`3` Nam and you weren't in the English Club last Tuesday

+) Were Nam and you in the English Club last Tuesday?

`4` They didn't eat noodles two hours ago

+) Did they eat noodles two hours ago?

`5` We didn't always have a nice time on Christmas holiday in the past

+) Did you always have a nice time on Christmas holiday in the past?

`6` My father didn't decorate the Christmas tree

+) Did your father decorate the Christmas tree?

`7` She didn't buy a new dress yesterday

+) Did she buy a new dress yesterday?

`8` They weren't late for school

+) Were they late for school ? 

`9` Mr Tam didn't take his children to the museum last Sunday

+) Did Mr Tam take his children to the museum last Sunday?

`10` Hoa didn't make a cushion for her armchair

+) Did Hoa make a cushion for her armchair?

* Thì Quá Khứ Đơn (Past Simple)

- Động từ tobe : was/were

+) S + was/were + ... 

-) S + was/were + not + ... 

?) Was/were + S + ... ? 

- Động từ thường:

+) S + Ved/V2 + O 

-) S + did not + V nguyên + O (did not = didn't)

?) Did + S + V nguyên + O ? 

* Dấu hiệu : yesterday , last week/month/year/... , when I was a child , in + time (trong QK) , time (trong QK) + ago , ...  

* Cách chia động từ tobe was/were

- We/you/they/danh từ số nhiều + were

- He/she/it/I/danh từ số ít + was