Learn Hardcore Korean: naenyeone doseogwaneseo deo manhi gongbuhal geoyeyo. - I will study more at the library next year.

-에 is a particle that marks a point in time (or place). When you attach it to the time noun 내년 (next year), it specifies “in/at next year.” So 내년에 literally means “in next year”, indicating when the action will take place.

Why do we say 도서관에서 instead of 도서관에?

We use 에서 to show where an action happens. Since 공부하다 (to study) is an action verb, you need 에서 for “at/in the library.”

도서관에서 공부하다 = “to study at the library.”
By contrast, 에 alone would mark a destination (“to the library”) or a location for existence (“at the library” in a stative sense), but not the site of an active verb.

What does 더 많이 mean, and why are both words necessary?

많이 means “a lot” and directly modifies the verb 공부하다 to mean “study a lot.”
더 means “more” and modifies 많이, making it comparative: 더 많이 = “more (than before).”
You cannot say 더 공부할 거예요 because 더 needs something more concrete to modify. Likewise, 많이 공부할 거예요 means “will study a lot,” but 더 많이 공부할 거예요 emphasizes “will study even more.”

How is the future tense formed with -을 거예요, and why is it attached to 공부할?

To make a verb future-tense with -을 거예요:

Remove 다 from the dictionary form 공부하다 → 공부하.
Because the stem ends in a vowel, add ㄹ → 공부할.
Attach 거예요 (거 = contracted 것, 예요 = polite copula).
So 공부할 거예요 literally “(It) is the thing that will be studied,” idiomatically “will study.”

Could I say 내년에 도서관에서 더 많이 공부할 거야 instead? What’s the difference?

Yes. 공부할 거야 is the informal (반말) form, while 공부할 거예요 is the polite form.

Use 거예요 when speaking politely or to strangers.
Use 거야 with close friends, family, or those younger than you.

Why is the word order 내년에 도서관에서 더 많이 공부할 거예요? Can I move 더 많이 elsewhere?

Korean typically follows:
(Time) + (Place) + (Adverb) + (Verb Phrase).
Here that gives:

내년에 (time)
도서관에서 (place)
더 많이 (adverbial phrase)
공부할 거예요 (verb phrase)

Moving 더 많이 before 도서관에서 (e.g. 내년에 더 많이 도서관에서…) sounds unnatural and can shift emphasis. It’s best to keep time → place → adverb → verb.

What exactly is 거 in 공부할 거예요, and why do we use it?

거 is the colloquial contraction of 것 (“thing”). In -을 거예요 it

nominalizes the verb (공부할 것 = “the thing that will be studied”).
combines with 예요 to form a polite future tense.

Over time, 것 contracted to 거, so 공부할 거예요 literally means “it is the thing I will study/do,” i.e. “I will study.”

How is 내년에 pronounced, especially with the double ㄴ?

When 내년 (nae-nyeon) meets 에 (e), the final ㄴ of 년 and the initial ㅇ of 에 cause a smooth “ㄴㄴ” transition. You’ll hear something like [내년녜] (nae-nye-nye). The two ㄴ sounds blend, so it doesn’t pause between them.