I have an easy question about the usage of the expression: next week / month/ year.
What is the difference between these three sentences?
I'll probably go the mountains next week.
I'll be on holiday for the next week.
I'm sure there will be a lot of work to do in the next week.
I've found on the internet that the first sentence means "in a specific moment of the next week", but I can't understand the difference between the second and third sentence. What is the difference between for the next and in the next?
I've already tried looking for similar threads but none of them has answered my question. I hope you can help me!