Past simple/Past continuous
"to go" in past continuous
was going
"to know" in past perfect
had known
"to eat" in past continuous
was eating
They __________ to the beach, when the police ___________ them for speeding. (drive, stop)
They were driving to the beach, when the police stopped them for speeding.
You _____ Mandarin before you ______ to China (study/move).
You had studied Mandarin before you moved to China.
Marc _______ Philadelphia so well because he ______ there for five years (know/live).
Marc knew Philadelphia so well because he had lived there for 5 years.
I ___________ my wallet while we _________to the supermarket. (lose, walk)
I lost my wallet while we were walking to the supermarket.
Before the students ________ to write, the teacher _________ their mobile phones (start/collect).
Before the students started to write, the teacher had collected their mobile phones.
I ____________ (watch) when the pizza finally _________ (arrive).
I was watching the show when the pizza finally arrived.
My mother _____________ when the fire alarm suddenly __________ off. (sleep, go)
My mother was sleeping when the fire alarm suddenly went off.
I________what my mother___________. (Remember, say)
I remembered what my mother had said.
My friend _______to go back to the store because she ___________a beautiful bag. (Want, see)
My friend wanted to go back because she had seen a beautiful bag.
He ____________ the bottle of wine on the floor while he was ____________ dinner. (drop, cook)
He dropped the bottle of wine on the floor while he was cooking dinner.
When the people________at the cinema the film_________already______. (Arrive, start)
When the people arrived at the cinema the film had already started.
He ______________ TV while he_____________ his homework. (watch, do)
He was watching TV while he did his homework.