I say 'thank you' in everyday situations like when someone holds the door open for me or when a cashier gives me my change. It's just a polite thing to do.

I say 'thank you' on special occasions, like when I get a gift for my birthday or when someone hosts a dinner. It's important to show appreciation for these thoughtful gestures.

In formal situations, I say 'thank you' in emails or during speeches. It's a way to show appreciation for help or support in a professional setting.