जब मुझे ऊब होती है, तब मैं किताब पढ़ती हूँ।

जब ... तब is a very common Hindi correlative pair meaning when ... then.

So:

• जब मुझे ऊब होती है = when I feel bored / when I get bored
• तब मैं किताब पढ़ती हूँ = then I read a book

In natural English, we usually do not say then every time, but in Hindi, जब ... तब is a very normal pattern.

Also, तब is sometimes omitted in everyday speech if the meaning is already clear:

• जब मुझे ऊब होती है, मैं किताब पढ़ती हूँ।

That still sounds fine.

Hindi often expresses feelings, sensations, and experiences using मुझे rather than मैं.

Here, मुझे literally means something like:

• to me
• for me

So मुझे ऊब होती है is literally closer to:

• boredom happens to me
• I experience boredom

This is a very common Hindi pattern with feelings and physical states. Compare:

• मुझे ठंड लगती है = I feel cold
• मुझे भूख लगती है = I feel hungry
• मुझे डर लगता है = I feel afraid

So even though English uses I, Hindi often uses मुझे for this kind of meaning.

ऊब means boredom.

In this sentence, Hindi is not using an adjective like English bored. Instead, it uses a noun-like idea:

• ऊब होती है = boredom happens / is felt

So the whole phrase मुझे ऊब होती है means:

• I feel bored
• I get bored

A related verb is ऊबना, which means to become bored.

For example:

• मैं ऊब गया। = I got bored. (male speaker)
• मैं ऊब गई। = I got bored. (female speaker)

But in your sentence, the structure is the more habitual/state-like मुझे ऊब होती है.

Because ऊब is feminine in Hindi.

The verb होना here agrees with ऊब, so it becomes:

• ऊब होती है (feminine singular)

If the noun were masculine, you would usually see होता है instead.

So the logic is:

• ऊब = feminine singular noun
• therefore होती है

This agreement is with ऊब, not with the speaker.

पढ़ती हूँ shows that the speaker is female.

In the present habitual, the verb agrees with the subject:

• मैं किताब पढ़ता हूँ = I read a book / I do read a book (male speaker)
• मैं किताब पढ़ती हूँ = same meaning, but female speaker

So your sentence is being said by a woman or girl.

Yes, but more specifically, it is a habitual present kind of meaning.

The sentence is not talking about one single event happening right now. It expresses something that happens regularly or whenever the situation occurs:

• When I get bored, I read a book.

So:

• होती है = a regular/state expression
• पढ़ती हूँ = habitual action

It suggests a repeated pattern, not just one moment.

Literally, किताब is singular: book.

But in Hindi, singular nouns are often used in a more general way than in English. So depending on context, मैं किताब पढ़ती हूँ can feel like:

• I read a book
• I read books
• I do some reading / I read a book to pass the time

Hindi does not use articles like a and the, so the exact English choice depends on context.

If you wanted to make it clearly plural, you could say:

• मैं किताबें पढ़ती हूँ। = I read books.

But the singular in your sentence is perfectly natural.

Hindi does not have articles like English a, an, and the.

So:

• किताब can mean a book, the book, or just book/books in a general sense

You figure out the exact meaning from context.

That is why मैं किताब पढ़ती हूँ can be translated in different natural English ways depending on the situation.

Yes. मुझे and मुझको are very close in meaning here.

So both are possible:

• जब मुझे ऊब होती है...
• जब मुझको ऊब होती है...

In everyday Hindi, मुझे is often more common and slightly more natural in many situations, but मुझको is not wrong.

Usually, no—not if you specifically mean when.

Use:

• जब ... तब = when ... then
• अगर ... तो = if ... then

So:

• जब मुझे ऊब होती है, तब मैं किताब पढ़ती हूँ। = When I get bored, I read a book.
• अगर मुझे ऊब होती है, तो मैं किताब पढ़ती हूँ। would sound more like If I feel bored, I read a book, which is possible in some contexts, but it is not the same basic idea.

Since the sentence describes a regular time relationship, जब ... तब is the better choice.

Yes, to some extent.

Hindi word order is flexible, especially with time clauses like this. For example, these are all possible:

• जब मुझे ऊब होती है, तब मैं किताब पढ़ती हूँ।
• जब मुझे ऊब होती है, मैं किताब पढ़ती हूँ।
• मैं किताब पढ़ती हूँ जब मुझे ऊब होती है।

The first one is the clearest and most textbook-like.

Hindi often prefers putting the when clause first, but other orders can work depending on emphasis and style.

No, तब is helpful but not always required.

These both work:

• जब मुझे ऊब होती है, तब मैं किताब पढ़ती हूँ।
• जब मुझे ऊब होती है, मैं किताब पढ़ती हूँ।

Including तब makes the when ... then relationship more explicit and nicely balanced. It can sound a bit more formal or more complete.

They are related, but not exactly the same.

मुझे ऊब होती है

This focuses on the experience/state:

• I feel bored
• I get bored

It is a common, natural way to talk about boredom as a feeling.

मैं ऊब जाती हूँ

This focuses more on the change into that state:

• I become bored
• I end up getting bored

So:

• जब मुझे ऊब होती है... = when I feel bored
• जब मैं ऊब जाती हूँ... = when I get bored / when I become bored

Both are possible, but your sentence uses the more experience-based pattern.

The tricky part is ढ़.

In पढ़ती, the middle sound is not a plain d. It is a Hindi retroflex flapped sound, written ढ़.

Roughly:

• पढ़ती sounds like puh-rh-tee or pudh-tee, but neither spelling is exact

A few points:

• प = p
• ढ़ = a soft retroflex/flapped sound, hard to match exactly in English
• ती = tee

Learners often pronounce it too much like plain padhti. Native pronunciation is softer and more curled back in the mouth.

Not as written.

Because it says पढ़ती हूँ, the speaker is female.

For a male speaker, it would be:

• जब मुझे ऊब होती है, तब मैं किताब पढ़ता हूँ।

Everything else stays the same.

Because the two parts are built differently.

In the first clause:

मुझे ऊब होती है

Here, the verb agrees with ऊब, which is feminine singular, so you get:

• होती है

This is a kind of impersonal/experiential structure.

In the second clause:

मैं किताब पढ़ती हूँ

Here, the subject is clearly मैं, so the verb uses the first-person auxiliary:

• पढ़ती हूँ

So the difference comes from the grammatical structure of each clause, not from a tense difference.