Ha fáradt vagyok, leülök egy kicsit a fotelbe, és nem nézek tévét.

Ha usually means if. In sentences like this, though, English often translates it more naturally as when if the speaker means something that happens regularly:

• Ha fáradt vagyok... = If I am tired... / When I’m tired...

So Hungarian uses ha where English might choose either if or when, depending on context.

In Hungarian, predicate adjectives normally come before the verb to be:

• fáradt vagyok = I am tired
• literally: tired am-I

So fáradt vagyok is the normal word order.
Vagyok fáradt would sound unusual and would only appear in special emphasis.

Hungarian usually leaves out subject pronouns when they are clear from the verb ending.

• vagyok already means I am
• leülök already means I sit down

• nézek already means I watch

  So you do not need én unless you want emphasis:

• Én vagyok fáradt = I am the one who is tired / I am tired with emphasis

Vagyok is the 1st person singular present form of van (to be).

So:

• fáradt vagyok = I am tired

Some common forms of to be in the present are:

• vagyok = I am
• vagy = you are
• van = he/she/it is
• vagyunk = we are
• vagytok = you all are
• vannak = they are

Leülök means I sit down.

It is made from:

• ül = sit
• leül = sit down
• leülök = I sit down

The prefix le- often adds the idea of downward movement or completion. So:

• ülök = I am sitting
• leülök = I sit down

That is why leülök is used here: it describes the action of sitting down, not just already being seated.

This is a very common learner question.

• -ban / -ben = in (location, being inside)
• -ba / -be = into (movement toward the inside)

So:

• a fotelben = in the armchair
• a fotelbe = into the armchair

Because the verb is leülök (I sit down), Hungarian often treats this as movement into the chair, so a fotelbe is natural.

English often just says sit down in the armchair, but Hungarian prefers the directional ending here.

A is the definite article, meaning the.

• a fotelbe = into the armchair

Hungarian has two definite articles:

• a
• az

Which one is used depends on the following sound:

• a fotel = the armchair
• az asztal = the table

So here a is used because fotel begins with a consonant.

Egy kicsit means a little or for a bit / for a little while, depending on context.

In this sentence it most likely means:

• I sit down for a bit
• I sit down a little while

Literally:

• egy = one / a
• kicsit = a little

It is a very common expression in Hungarian.

Kicsit is the accusative form of kicsi-based expression, used in the fixed phrase egy kicsit.

You should usually learn egy kicsit as a whole expression meaning:

• a little
• a bit

You do not need to analyze it every time; it functions very naturally as an adverbial phrase.

In Hungarian, nem normally goes directly before the verb it negates.

• nem nézek = I do not watch

So:

• és nem nézek tévét = and I don’t watch TV

This is the standard place for nem in simple sentences.

This is an important Hungarian distinction.

• nézek tévét = I watch TV as an activity in general
• nézem a tévét = I am watching the TV / the television set / a specific TV thing

Hungarian has indefinite and definite verb conjugation.

Here:

• nézek is the indefinite form
• it is used because tévét here means TV in a general sense, not a specific identifiable object

This is similar to English watch TV rather than watch the TV.

Because it is the direct object of nézek.

Hungarian marks direct objects with the accusative ending -t.

• tévé = TV
• tévét = TV as the object

Compare:

• Olvasok egy könyvet. = I am reading a book.
• Nézek tévét. = I watch TV.

So the -t ending shows that tévé is what is being watched.

Nézek is the 1st person singular present indefinite form of néz (to watch / look at).

Hungarian verbs change not only for person and number, but also for whether the object is definite or indefinite.

Here:

• nézek tévét uses the indefinite conjugation

If the object were definite, you would use a different form:

• nézem a tévét = I’m watching the TV

So nézek is correct because tévét is being used in a general, non-specific sense.

Not completely. Hungarian word order is fairly flexible, but different orders change emphasis.

The neutral sentence is:

• Ha fáradt vagyok, leülök egy kicsit a fotelbe, és nem nézek tévét.

You could also move parts around for emphasis, for example:

• Ha fáradt vagyok, egy kicsit leülök a fotelbe...
• Nem nézek tévét, ha fáradt vagyok...

These versions may sound different in focus, but the basic meaning stays similar.
So the given sentence has a natural, neutral word order.

In standard writing, the comma after the ha-clause is normal:

• Ha fáradt vagyok, ...

That is because the sentence begins with a subordinate clause (if/when I’m tired), followed by the main clause.

So the comma is part of standard Hungarian punctuation here.

És means and.

It links the two main actions:

• leülök egy kicsit a fotelbe = I sit down for a bit in/into the armchair
• nem nézek tévét = I don’t watch TV

So:

• ..., és nem nézek tévét. = ..., and I don’t watch TV.

This works very much like English and.