為何thank 這個字在字尾都加 s?

Thanks - interjection/noun

Examples:
1. 'Can I get you a drink?' 'No, thanks.'

2. Thanks for the dinner! It was great.

3. Thanks to all of you who really helped me.

4. She won't get any thanks from her children.



Thank - verb

Examples:
1. Thank the organizers for an excellent workshop.

2. Thank whoever made this Web site and those who helped imporve it.

3. Thank God I finally got a job.

4. How do you properly thank someone for such a generous gift?

5. Thanks for everything. I can't thank you enough. (Thanks + thank)



Thank you (abbreviation of "I thank(verb) you") - performative verb (informal)

Examples:
1. Thank you for helping me get a few example sentences.

2. Thank you for your kind attention.

3. God, Thank you for everything.

4. Thank you for being true, and just simply loving me.

Thanks <<slightly informal,more casual
'Thanks' is a noun.

'Thank you',the 'thank' is a verb.

They are interchangeable

Thanks~ ^__^

Thank you~

這個是一個很好的問題。

Thank is mainly used in the expressions “thank you” and “thanks”.

THANK (transitive verb)
If you thank someone, you express gratitude for something they have done or something they have given you.

Format: Thank someone for something.
He thanked me for what I had done.

Format: Thank someone for doing something.
He thanks his classmates for attending the wedding.
(thanks is a verb in this case)

THANKS (noun)
It is always used in plural form. (thank + s)
How can I ever express my thanks to you for what you have done?

THANKS (interjection)
No thanks!
Thanks very much.
Thanks for asking.

Thank you very much.
In this case, “thank” is used as a transitive verb. It needs an object.

Thank you has inevitably produced a number of equivalent phrases showing varying degrees of formality and emphasis.
In various circumstances, it is lengthened to thank you so much or thank you very much, sometimes with additional of “indeed” for good measure. Thanks is a shade less cordial than thank you, so. “Many”, “a lot”, and “a thousand“ are frequent elaboration of it.