While I __________ (walk) to school, I __________ (see) an old friend.

When the teacher __________ (enter) the classroom, the students __________ (talk) loudly.

While my parents __________ (cook) dinner, I __________ (do) my homework.

I __________ (lose) my wallet while I __________ (travel) by bus.

When we __________ (arrive) at the museum, the guide __________ (explain) something to a group of tourists.

While Sarah __________ (wait) for the bus, she __________ (read) a book.

Tom __________ (fall) off his bike while he __________ (ride) through the park.

When I __________ (call) Jack last night, he __________ (watch) a football match.

While we __________ (have) dinner, the lights __________ (go) out.

The children __________ (play) in the garden when their mother __________ (call) them.

While I __________ (study) for my exam, my brother __________ (listen) to music.

When the rain __________ (start), we __________ (walk) around the old town.

My dad __________ (drive) home when he __________ (notice) a strange noise from the car.

While the students __________ (take) the test, the teacher __________ (sit) at her desk.

When I __________ (open) the door, my sister __________ (talk) on the phone.

We __________ (not / go) to the beach because it __________ (rain) heavily.

While David __________ (run) in the park, he __________ (hurt) his leg.

When the police __________ (arrive), the people __________ (not / leave) the building.

I __________ (not / hear) the phone because I __________ (take) a shower.

While they __________ (walk) home, they __________ (find) a lost dog.

When we __________ (visit) the village, the local people __________ (celebrate) a traditional festival.

While Anna __________ (clean) her room, she __________ (find) an old photograph.

I __________ (not / sleep) when you __________ (call) me last night.

When the film __________ (start), we __________ (sit) in the wrong seats.

While the tourists __________ (take) photos, the guide __________ (tell) them about the history of the building.

My brother __________ (break) his phone while he __________ (play) football.

When I __________ (arrive) home, my parents __________ (not / watch) TV.

While we __________ (wait) for the train, we __________ (meet) some students from Spain.

The teacher __________ (not / explain) the exercise when I __________ (enter) the classroom.

While I __________ (shop) at the market, I __________ (meet) my old English teacher.

When the storm __________ (begin), everyone __________ (stay) inside the hotel.

While my mother __________ (prepare) breakfast, my father __________ (read) the newspaper.

We __________ (not / see) the accident because we __________ (look) in the other direction.

When the concert __________ (finish), the audience __________ (leave) the stadium quickly.

While I __________ (walk) through the museum, I __________ (notice) a very unusual painting.

The students __________ (not / talk) when the teacher __________ (come) into the room.

When I __________ (wake) up, my brother __________ (sleep) in his room.

While the workers __________ (repair) the road, a car __________ (hit) one of the barriers.

She __________ (not / listen) to music when I __________ (see) her on the bus.

While we __________ (explore) the old castle, we __________ (discover) a secret room.

When the teacher __________ (ask) me a question, I __________ (not / pay) attention.

While the children __________ (swim) in the pool, their parents __________ (sit) nearby.

I __________ (drop) my phone while I __________ (run) for the bus.

When we __________ (get) to the station, the train __________ (already / leave).

While Nam __________ (take) photographs, his friends __________ (look) around the village.

We __________ (not / hear) the announcement because we __________ (talk) to each other.

When I __________ (see) Mary yesterday, she __________ (carry) a large box.

While the guide __________ (speak), one of the tourists __________ (ask) an interesting question.

My parents __________ (go) to bed after they __________ (finish) watching the film.

While I __________ (write) an email, my computer suddenly __________ (stop) working.