**Here are 10 examples of using the word «sour» in English:**
1. The milk went sour, so I had to throw it away.
2. She made a sour face when she tasted the soup.
3. The weather turned sour, and it started to rain heavily.
4. The negotiations turned sour when they couldn't agree on terms.
5. The apple was too sour for my taste, so I threw it away.
6. The relationship between the two countries became sour after the diplomatic incident.
7. The lemon juice added a sour taste to the salad dressing.
8. The joke fell flat and left a sour taste in everyone's mouth.
9. The atmosphere at the party turned sour when a disagreement broke out.
10. The smell of the spoiled food was sour and unpleasant.