past perfect
The doorbell rang while I was taking a shower.
While she ____ (cook), the telephone ______ (ring).
While she was cooking, the telephone rang.
The doorbell had rung/rang while I had taken/was taking a shower.
The doorbell rang while I was taking a shower.
He _____ (lose) his wallet while he _____ (jog) in the park.
He lost his wallet while he was jogging in the park.
He _____ (lose) his wallet while he _____ (jog) in the park.
He lost his wallet while he was jogging in the park.
his/ dog/ ran after/ girlfriend/ Neil's/ yesterday
Yesterday, Neal's dog ran after his girlfriend.
Mr. and Mrs. Davis had tripped/tripped and had fallen/fell while they were dancing/danced.
Mr. and Mrs. David tripped and fell while they were dancing.