How could you say "Ive been studying for several days"? What preposition would you use with flera?
Jag har studerat i flera dagar, but the preposition isn't because of flera, it's because of dagar.
What is the difference between dag and dygn? Are they interchangeable?
A dag is generally used to refer to the bright part of the day, as opposed to the night, but could also be used to count days, as in the days of a week. A dygn specifically refers to a period of 24 hours. There are situations where they can be used interchangeably. Any native speakers that can verify this?
Yes, that's a very good summary. We tend to use dygn if it's important in some way to point out the full 24 hours.
Well, Google says this: „SEVERAL is used to mean more than “some” but less than “many.” Again, there is no exact number. The dictionary says it means more than a few but not a great number. [...] As for MANY, it means a multitude“. Hope it helps!
I still need to convince my brain that 'dagar' means 'days' and not 'dogs'. A stubborn brain I have