1. I saw Henry as I was cycling to the sports centre.
2. While we were preparing the picnic, it started to rain.
3. All my friends were leaving the party when I arrived.
4. As we were walking by the river, we hearted a shout.
5. We didn't eat very much while we were staying in that hotel.
6. I drank my dad's coffee while he was not looking.
7. She dropped her new phone as she was putting it in her pocket.
8. I met a really interesting person while I was waiting for the bus.