Каждое предложение: -переделать сначала в отрицательное и перевести на -переделать в вопросительное со специальным вопросом на -переделать в вопросительное с общим вопросом на 1)я прогуливался по улице когда услышал крик . 2)он ехал слишком быстро когда случилась авария . 3)когда поезд отъехал от станции она все еще стояла на пероне .

I was walking along the street when I heard a cry.
I wasn't walking along the street when I heard a cry.
What was I doing when I heard a cry?
Was I walking along the street when I heard a cry?

He was driving too fast when the crash happened.
He wasn't driving too fast when the crash happened.
How was he driving when the crash happened?
Was he driving too fast when the crash happened?

When the train left the station she was still standing on the platform.
She wasn't standing on the platform when the train left the station.
Where was she standing when the train left the station?
Was she still standing on the platform when the train left the station?