**Here are some examples of using the word «once»:**
1. **Once** I finish my homework, I will go for a walk with my friends.
2. She used to be very shy, but **once** she started speaking in public, she became more confident.
3. We have to arrive at the airport **once** the plane lands, so we need to hurry.
4. He promised to help me with my project, but he never did it **once**.
5. **Once** it stops raining, we can go to the beach.
6. She was very nervous before the interview, but **once** she got inside the room, she felt more comfortable.
7. **Once** you have tried this dish, you will definitely want to cook it again.
8. He used to smoke a lot, but **once** he quit, he feels much better.
9. **Once** we finish packing, we will take a break before leaving.
10. She always wears a hat, but **once**, she forgot it at home and felt very embarrassed.