Question

When I (arrive) at the party, most of the guests (already/leave). By the time we (get) to the beach, the sun (already/set). I (study) for the test for weeks before I (realize) that I (misplace) my notes. When the concert (start), we (already/wait) in line for two hours. By the time the firefighters (arrive), the house (burn) to the ground.While I (watch) TV, my sister (read) a book. The children (play) in the park when it (start) to rain.He (drive) home from work when he (get) a call from his boss.They (dance) at the party when the music suddenly (stop).We (enjoy) the concert when someone (spill) a drink on us.​

Answer 1

When I arrived at the party, most of the guests had already left.

By the time we got to the beach, the sun had already set.

I had been studying for the test for weeks before I realized that I had misplaced my notes.

When the concert started, we had already been waiting in line for two hours.

By the time the firefighters arrived, the house had burned to the ground.

While I was watching TV, my sister was reading a book.

The children were playing in the park when it started to rain.

He was driving home from work when he got a call from his boss.

They were dancing at the party when the music suddenly stopped.

We were enjoying the concert when someone spilled a drink on us.

Answer 2

Here are the sentences with the correct verb forms:

1. When I arrived at the party, most of the guests had already left.
2. By the time we got to the beach, the sun had already set.
3. I had been studying for the test for weeks before I realized that I had misplaced my notes.
4. When the concert started, we had already waited in line for two hours.
5. By the time the firefighters arrived, the house had burned to the ground.
6. While I was watching TV, my sister was reading a book.
7. The children were playing in the park when it started to rain.
8. He was driving home from work when he got a call from his boss.
9. They were dancing at the party when the music suddenly stopped.
10. We were enjoying the concert when someone spilled a drink on us.