How to Use "sour" with Example Sentences

1. Cornel is sour , but tasty and healthy berry .
2. Gives coffee its slightly sour flavor .
3. Reach out to clients in private if you feel things could turn sour
4. His habitually sour expression changed .
5. Fiona couldn 't hide the sour disappointment in her face , but she had staked too much , too noisily , on her desperate need for the pub to back down now .