Always use "krub" (for men) and "ka" (for women) when you want to be polite. Add these words to the end of all the examples below.

"khorb khun" means "Thank you".

"mai ben rai" means "it's ok". For example when someone tries to give you something but you don't want it or someone says thanks to you, you say mai ben rai.

"khor thot" means "sorry". You will say it when you want to interrupt someone, when you want to pass someone or when you do something wrong.

"sia jai" means "sorry" too. But in this case it means different thing. Like if someone died or got hurt, you say "phom/di-chan sia jai" which means "I am sorry".