When - While

When (dokonane):
I. S. Past + P. Cont.
When it started to rain I was working in the garden.

II. P. Cont. + S. Past
I was working in the garden when it started to rain.
I was speaking (talking) on the phone when the doorbell rang.

While (niedokonane):
I. S. Past + P. Cont.
Someone knocked on/at my door while I was having a bath.

II. While + P. Cont. + S. Past
While I was going back home I came across Peter, an old friend of mine.
While I was preparing the meal the telephone rang.

III. P. Cont. + while + P. Cont.
We were preparing for a test in maths, while our friends were doing shopping.

1. What were you doing when I called you last night?
When you called me last night I was sleeping.

2. What was your sister doing when you came back home yesterday?
When I came home yesterday she was kissing my boyfriend.

3. Where were Ann and Iga going when you met them an hour ago?
When I met them an hour ago they were going to school.

4. Who were you speaking to when I came into the room?
When you came into the room I was speaking to a ghost.

5. What were you waiting for when I came across you?
When you came across me I was waiting for my friend.

6. What happened while you were eating your lunch?
While I was eating my lunch, somebody stole my purse.

7. What did you see while you were walking down the street?
While I was walking down the street, I saw a man in a black coat with a big gun.
Ian Fleming was working as a stockbroker when the Second World War started.
She met her husband, Noel, while she was learning English in Cambridge.
I fell and hurt myself while I was playing tennis.
While I was talking to Barbara, I learned that Tony was in hospital.
I met friend while I was doing the shopping.
I was paying for my things when I heard someone call my name.
While we were having a drink, a waiter dropped a pile of plates.
While the waiter was picking up the broken plates, he cut his finger.
I broke my leg when I fell down in the street.
When he was 19 years old he went to Switzerland.
She was asleep when I returned.
She was reading when I came in.
While he was turning the key in the lock, someone opened a door on the corridor.