ANSWER:

`2.` I was chossing a bracelet for mum when Mum came into the shop.

`3.` Louies was talking to Mary when the bus arrived.

`4.` When Harried was looking for some plasters, she found her watch.

`5.` The team was training when Ted had an accident.

`6.` When we were walking around the ruins, some stones falled.

`7.` The actor was performing on stage when the director started to laugh.

`8.` When I was carrying some bottles, the carry bag broke.

`9.` When they were shopping, it started to rain.

EXPLAIN:

Past Continous:

`+` S + was/were + V_ing.

`-` S + wasn't/weren't + V_ing

`?` Was/Were (not) + S + V_ing?

`@` Yes, S + was/were 

`@` No, S + wasn't/weren't`

`Wh` Wh + was/were (not) + S + V_ing?

`#yng95`

`***` CT áp dụng: S + was/were + V-ing + when + S + V-ed/c2

`=` S + V-ed/c2 + when/while + S + was/were + V-ing

`->` Diễn tả một hành động đang diễn ra đột nhiên có một hành động khác chen ngang.

`-` Hành động đang xảy ra viết ở thì QKTD, hành động chen ngang viết ở thì QKĐ

`-` 'was' đi với các CN 'I, she, he, it' và DT số ít

`-` 'were' đi với các CN 'you, we, they' và DT số nhiều

`-----------`

`2.` I was choosing a bracelet for Mum when Mum came into the shop.

`3.` Louise was talking to Amy when the bus arrived.

`4.` When Harriet was looking for some plasters, she found her watch.

`5.` The team was training when Ted had an accident.

`6.` When we were walking around the ruins, some stones fell.

`7.` The actor was performing on stage when the director started to laugh.

`8.` When I was carrying some bottles, the carrier bag broke.

`9.` When they were shopping, it started to rain.