"그 여자가 열흘 동안 커피를 못 마신다."

Translation: That woman cannot drink coffee for ten days.

[pinkem]

What is the difference between cannot and does not? Would 'does not' be 안 마신다?

[nleconte]

Yes, indeed. 못 indicates inability, while 안 is a general negation.

[YunisR]

Why is it 마신다 and not something with ~입니다 or ~어요?

[HamaSay]

What do you mean? 마신다 = written form

[YunisR]

Yeah, but how is it formed?

[HamaSay]

https://www.duolingo.com/skill/ko/Written/tips-and-notes

[YunisR]

I don't know why they don't add this to the app. I have to use the website to understand stuff.