I was surprised (when - while) I heard the news.
when
The film started (when - while) he was getting some popcorn.
while
They laughed at me (when - while) I was singing.
while
The dog was running towards me (when - while) it suddenly stopped.
when
The cat was eating a fish (when - while) I saw it.
when
She was walking home (when - while) she saw an accident.
when
He saw the bear (when-while) he was walking in the forest.
while
He stayed inside (when - while) it was raining.
while
They saw dolphins (when-while) they were sailing.
while
Her mother was making a cake (when-while) she arrived.
when
(when-while) we were playing tennis, she called me.
while
(when-while) I was cooking, my mother came home.
while
(when-while) my friend arrived, I was baking cookies.
when
I was reading a book (when - while) my friends arrived to my house.
when
