`-` When + S + Ved / V2 , S + was / were + V-ing

`-` While + S + was / were + V-ing , S + Ved / V2

`=>` Dùng để diễn tả về hành động đang xảy ra , hành động chỉ xảy ra `1` lúc

`-` While + S + was / were + V-ing , S + was / were + V-ing

`=>` Dùng để diễn tả về `2` hành động đang xảy ra cùng `1` lúc

`=>`

`+` I , He , She , It `+` was ( not )

`+` You , We , They `+` were ( not )

`1`.was doing / phoned

`2`.were playing / started

`3`.had / was looking

`4`.was skiing / broke

`5`.saw / were playing

`6`.was swimming / attacked

`7`.rang / was having

`8`.were crossing / turned

`9`.came / was jumping

`10`.met / was doing

`\text{# TF}`