`-` Thì QKĐ ( KĐ `-` PĐ ) :

`+` KĐ : S + Ved / V2 `-` S + was / were + adj / n

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

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

`1`.Sue wasn't tired

`2`.She had brown hair

`3`.My grandma was happy

`\text{# Eternal}`

`(+)` S `+` Ved`/` Vc2 `....`

       S `+` be (was`/` were) `+` adj`/` n

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

      S `+` tobe not(was not`/` were not) `+` adj`/` n

`(?)` Did `+` S `+` V`-`infi `?`

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

`=>`

`1.` Sue isn't tired`.`

`->` Sue wasn't tired`.`

`2.` She has brown hair`.`

`->` She had brown hair`.`

`-` have`/` has `->` had

`3.` My grandma is happy`.`

`->` My grandma was happy`.`