I didn't recognise / hadn't recognised Sue, because she cut / had cut her hair.
didn't recognise - had cut
We had already eaten when John (get) ________ home.
got (simple past)
I didn’t saw her at the party last night.
I didn’t see her at the party last night.
While she ____ (cook), the telephone ______ (ring).
While she was cooking, the telephone rang.
The doorbell rang / rings while I took /was taking a shower.
rang .... was taking
While my mum ________(cook), I ________(tidy) my room.
While my mum was cooking, I was tidying my room.
When I was arrived, everyone had already left.
When I arrived, everyone had already left.
David didn't play / hadn't played the match because he hurt / had hurt his leg.
didn't play - had hurt
I opened my handbag to find that I (forget) ________ my credit card.
(Past perfect) had forgotten
He was cooking dinner after he had cleaned the kitchen.
He cooked dinner after he had cleaned the kitchen.
He _____ (lose) his wallet while he _____ (jog) in the park.
He lost his wallet while he was jogging in the park.
When I looked / had looked everywhere for my car keys, I started / had started to panic.
had looked - started
Where _______ (be) you when the teacher _______ (call) you?
Where were you when the teacher called you?
By the time we had got to the station, the train left.
By the time we got to the station, the train had left.
Paul didn't say that he ___________________ (take) Albert's watch.
Paul didn't say that he had taken Albert's watch.
Mr. and Mrs. Davis tripped / had tripped and fell / had been falling while they danced / were dancing.
Mr. and Mrs. David tripped and fell while they were dancing.
I opened the fridge and found that someone (eat) ________ all my chocolate.
(Past perfect) had eaten
She had been knowing him for years before they finally met in person.
She had known him for years before they finally met in person.