`@` Công thức :

`-` Với động từ thường :

`( + )` S + V`2`/ed + ...

`( - )` S + didn't + V-inf

`( ? )` Did + S + V ?

`-` Với động từ tobe ( was / were ) :

`( + )` S + be + O

`( - )` S + be + not + O

`( ? )` Be + S + O ?

`+` I + was

`+` We / You / They / Ns-es + were

`+` He / She / It / N + was

`@` DHNB :

`-` ____ ago

`-` yesterday

`-` in + năm trong quá khứ

`-` last ______

$#Ribee$

#lhuongg.

* Quá khứ đơn

`1.` CT

`-` ĐT thường :

`(+)` S + V-ed/c2 + ...

`(-)` S + didn't + V-nguyên thể + ...

`(?)` Did + S + V-nguyên thể + ... ?

`-` ĐT tobe :

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

`(-)` S + wasn't / weren't + ...

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

`-` Chú ý : 

I / He / She / It / CN số ít + was

You / We / They / CN số nhiều + were

`2.` DHNB

`-` Last night / week / month / year ; Time + ago ; Yesterday ; in the past ; the day before ; ...

`-` When + S + V-ed/c2