`2` Lily was wearing her new dress when I met her 

`3` We were watching a film when were heard a strange noise 

`4` When you called me , I was having dinner 

`5` When my dad got home , my sister was listening to music 

`=>` When + Quá Khứ Đơn , Quá Khứ Tiếp Diễn 

`=>` While + Quá Khứ Tiếp Diễn , Quá Khứ Đơn 

`@` Quá Khứ Đơn : 

`+` S + Ved/V2 + O 

`-` S + didn't + V nguyên + O 

`?` Did + S + V nguyên + O ? 

`@` Quá Khứ Tiếp Diễn : 

`+` S + was/were + V-ing + O 

`-`  S+ was/were + not + V-ing + O 

`?` Was/were + S + V-ing + O ?

`2.` Lily was wearing her new dress when I met her 

`3.` We were watching a film when we heard a strange noise

`4.` When you called me, I was having dinner

`5.` When my dad got home, my sister was listening to music 

_________________________________________________________________

Past Continous

- Diễn đạt hành động đang xảy ra thì có hành động khác xen vào

- Cấu trúc:

`(+)` S + was/ were + Ving 

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

`(?)` Was/ Were + S + Ving 

Past Simple

- Diễn tả hành động xảy ra trong quá khứ

- Diễn tả hành động xen vào 

- Cấu trúc:

`(+)` S + V-ed 

`(-)`  S+ didn't + V-inf

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