1. THANK YOU - DĚKUJI TI/DĚKUJI VÁM
Děkuji ti is saying thanks to someone who you know - to your parents or member of your family, friends or someone who you know or meet every day.
Děkuji vám is saying thanks to someone who you do not know - to bus driver, teacher, doctor or someone who is pretty much older than you.
Děkuji vám is also plural way how to say thanks to group of people - 2 or more.
2. THANKS - DÍKY
Díky is the most popular way how to say thanks in Czech language. It's also very simple and you can use it everywhere - in restaurant, in school, in bus or you can also say that to someone who you do not know or someone who is older than you. It does not matter when or where you use it.
3. THANKS - DÍK
The literal translation of word dík is thank, but dík is also a noun! Dík is a little bit slang form how to say thanks, so you it especially on some party or in a situation when you are with your friends.
Můžeš mi podat to kafe? Dík!
Can you give me a cup of coffee? Thanks!
4. THANK YOU VERY MUCH - MOCKRÁT TI/VÁM DĚKUJI
Thank you very much = Děkuji vám velice moc (this is just literal translation, do not use it!)
Please, remember that you can't translate Czech language word-for-word, I mean that you can't say děkuji vám velice moc, but mockrát ti děkuji or mockrát vám děkuji.
5. THANKS NICELY - DĚKUJI PĚKNĚ
Děkuji pěkně is from German Danke schön. We do not use this sentence so often, but here are situations, when you can use this form of thanks:
- Saleswoman gives you money - Děkuji pěkně!
- You do not know what kind of beer to choose, but the salesperson will recommend you the best one - Děkuji pěkně!
- You are leaving the hotel and the receptionist gives you a business card on their hotel - Děkuji pěkně!
Finally, I must tell you that the letter D sounds like it has a hook above that letter (Ď), but if the second letter E has hook (Ě), the letter D has no hook.
But, see the word EVIL in Czech ĎAS. Above D is hook, because the second letter has no hook.