**Here are 10 examples of using the word «whistle» in English:**
1. The referee blew his whistle to start the game.
2. I heard a whistle in the distance, signaling that it was time to leave.
3. The conductor gave a sharp whistle to gather everyone's attention before the train departed.
4. She whistled a cheerful tune as she walked down the street.
5. The police officer used a whistle to communicate with his colleagues during the operation.
6. The coach gave a whistle to signal a substitution during the soccer match.
7. The children were taught to whistle to summon help in case of emergency.
8. The captain gave a long whistle to indicate that the ship was about to leave the harbor.
9. The teacher used a whistle to control the noise level in the classroom.
10. He whistled softly to himself while working on his project, finding it calming.