Если мне надоест смотреть сериал, я почитаю книгу.

If I get tired of watching the series, I’ll read a book for a bit.

Breakdown of Если мне надоест смотреть сериал, я почитаю книгу.

• я: I
• книга: the book
• мне: me
• если: if
• смотреть: to watch
• сериал: the series
• надоесть: to get tired of / to be fed up with
• почитать: to read for a bit

Questions & Answers about Если мне надоест смотреть сериал, я почитаю книгу.

Why is there a comma in the middle of the sentence?

Russian normally uses a comma to separate the если (if) clause from the main clause:
Если мне надоест смотреть сериал, я почитаю книгу.
So: subordinate clause + comma + main clause.

What does мне mean here, and why is it dative?

Мне is the dative form of я and is used because надоесть works like to become boring to someone. The structure is impersonal:

• Мне надоело = It got boring to me / I got bored.
  So мне marks the experiencer (the person who feels boredom).

Why is надоест used instead of something like я устану or мне станет скучно?

Надоесть specifically means to become tiresome/boring (often after some time). It focuses on the activity becoming tiresome, not on physical tiredness.

• мне станет скучно = I’ll become bored (more general, about boredom as a feeling)
• я устану = I’ll get tired (often physical/mental fatigue)
  мне надоест смотреть сериал is very natural for getting tired of watching something.

What is the aspect of надоест, and why is it perfective?

Надоест is perfective (from the pair надоедать / надоесть). Perfective is used because it describes a completed change of state: the moment when the activity becomes tiresome.
So it’s like: if (at some point) it ends up boring me.

Why is смотреть imperfective? Shouldn’t it match the perfective надоест?

Смотреть is imperfective because it names the activity in general: watching (as a process). After verbs like надоесть, Russian typically uses an infinitive to name the ongoing activity that becomes tiresome:

• мне надоест читать / смотреть / слушать
  You’re not emphasizing completion of watching; you’re emphasizing the activity itself.

Does если here mean a real condition (likely) or more like hypothetical?

In this sentence it’s a normal future condition: if X happens, then I’ll do Y. It can be either likely or just a plan, but grammatically it’s a standard real-life condition. Russian uses future forms naturally in both parts when talking about the future.

Why is почитаю used, not прочитаю or буду читать?

Почитаю is perfective and often means to read for a while / do some reading (a limited amount, not necessarily finishing the book).

• прочитаю книгу usually implies finish the book.
• буду читать книгу focuses on the process: I’ll be reading a book (no implication of starting/finishing).
  So почитаю книгу suggests switching activities and reading some.

Is почитаю always “for a while”? What role does the prefix по- play?

Very often, по- on an imperfective verb creates a perfective meaning of doing something a bit / for some time (a delimitative sense). With читать → почитать, it commonly means to read for a while. Context can sometimes make it simply I’ll read (some), but the “a bit/for a while” nuance is typical.

Why is книгу in the accusative, and does it imply a specific book?

Книгу is accusative because it’s the direct object of читать. As for specificity: Russian has no articles, so книгу could be a book or the book depending on context. Here it often means a book (some book) unless the context makes a particular book obvious.

Could the word order change? For example, can I say Я почитаю книгу, если мне надоест смотреть сериал?

Yes. Both are correct:

• Если ..., я ... (condition first)
• Я ..., если ... (main action first)
  The comma still separates the clauses. The first version foregrounds the condition; the second foregrounds your plan.

Why does Russian use the future tense in the если clause? In English we often avoid future after if.

Russian does not follow the English rule of avoiding future after if. In Russian it’s normal to use future forms in an если clause when you mean future time:
Если мне надоест..., я почитаю...
So don’t try to force a “present tense” there; Russian expresses the timing directly.

How would I negate this sentence?

Common options:

• Negate the condition: Если мне не надоест смотреть сериал, ... = If I don’t get tired of watching the series, ...
• Negate the action: ..., я не почитаю книгу. = ..., I won’t read a book.
• Or both, depending on meaning.