A mosógép a fürdőszoba mellett van, és ma este is használom.

Because a/az is the Hungarian definite article, meaning the.

So:

• a mosógép = the washing machine
• a fürdőszoba = the bathroom

Hungarian often uses the definite article where English does too, so having it twice here is completely normal.

A quick note:

• a is used before consonant sounds
• az is used before vowel sounds

For example:

• a ház = the house
• az autó = the car

Yes. Mosógép is a compound word:

• mosó = washing
• gép = machine

So it literally means washing machine.

Hungarian makes a lot of compound nouns like this, and they are usually written as one word.

Because mellett is a postposition. Hungarian often uses postpositions where English uses prepositions.

So:

• mellett = next to / beside
• a fürdőszoba mellett = next to the bathroom

Unlike English prepositions, Hungarian postpositions come after the noun phrase.

Compare:

• English: next to the bathroom
• Hungarian: a fürdőszoba mellett

The noun fürdőszoba stays in its basic form here.

This is a very common question.

• mellett = next to / beside in a static location
• mellé = to next to / to beside with movement toward

So in your sentence:

• A mosógép a fürdőszoba mellett van. = The washing machine is next to the bathroom.

But if you moved something there:

• A mosógépet a fürdőszoba mellé teszem. = I put the washing machine next to the bathroom.

A simple way to remember it:

• -tt idea: already there
• -é idea: movement toward

Van means is or exists. Here it marks location:

• A mosógép a fürdőszoba mellett van. = The washing machine is next to the bathroom.

Hungarian uses van in sentences about where something is.

Important contrast: Hungarian often omits van in the present tense when the sentence is just X is Y with a noun or adjective.

For example:

• A mosógép új. = The washing machine is new.
• Péter orvos. = Péter is a doctor.

But with location, van is normally needed:

• Péter otthon van. = Péter is at home.
• A könyv az asztalon van. = The book is on the table.

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

• használom already tells you the subject is I

So Hungarian does not need én unless you want extra emphasis.

Compare:

• használom = I use it / I am using it
• én használom = I am the one using it / I use it

This is very normal in Hungarian. The verb ending carries a lot of information.

Because Hungarian has two main kinds of verb conjugation:

• indefinite conjugation
• definite conjugation

Here, használom is the definite form, used when the object is definite or understood as a specific thing.

The understood object is the washing machine:

• (a mosógépet) használom = I use it / I use the washing machine

So:

• használok = I use / I am using something (indefinite)
• használom = I use it / the specific thing (definite)

This is one of the most important features of Hungarian verbs.

Because Hungarian often leaves out an object if it is already obvious from context.

The full version could be:

• A mosógép a fürdőszoba mellett van, és ma este is a mosógépet használom.

But that sounds repetitive. Since the washing machine has just been mentioned, Hungarian naturally says:

• ... és ma este is használom.

The verb form használom already helps signal that a specific object is being used.

Here is means also / too / as well.

So:

• ma este is használom = I’m using it this evening too / I’ll use it tonight as well

Hungarian is is placed after the word or phrase it belongs to.

Here it follows ma este:

• ma este is = this evening too

Other examples:

• Én is megyek. = I’m going too.
• Péter is itt van. = Péter is here too.

Because is usually comes after the element it adds also/too to.

In this sentence, the whole time phrase is ma este = this evening / tonight, and is attaches to that phrase:

• ma este is = this evening too

If is were attached somewhere else, the emphasis would change.

For example:

• én is használom = I use it too
• ma is használom = I use it today too
• ma este is használom = I use it this evening too

So its position matters.

Ma este is a common time expression meaning this evening / tonight.

• ma = today
• este = evening

Together they function adverbially, so no extra ending is needed here.

Hungarian has many time expressions like this:

• ma reggel = this morning
• ma délután = this afternoon
• holnap este = tomorrow evening

So ma este is használom is perfectly natural.

Not completely. Hungarian word order is flexible, but it changes focus and emphasis.

The given sentence is fairly neutral:

• A mosógép a fürdőszoba mellett van, és ma este is használom.

This presents:

1. where the washing machine is
2. the fact that you’re using it tonight too

If you move things around, the meaning stays similar, but the emphasis shifts. For example:

• Ma este is használom. = neutral, with emphasis on this evening too
• Használom ma este is. = possible, but less neutral; sounds more marked in emphasis

For learners, the given order is a good natural model.

Because they do different jobs:

• és = and
• is = also / too

So:

• ..., és ma este is használom. = ..., and I’m using it this evening too.

They are not interchangeable.

Yes. In Hungarian, accents are part of the spelling and they matter for pronunciation.

For example:

• ó is a long o
• ő is a long front rounded vowel
• ü and ű, ö and ő are distinct vowels

So in this sentence, it helps to notice:

• mosógép
• fürdőszoba
• mellett
• használom

Hungarian spelling is quite regular, so if you learn the sounds of the letters, pronunciation becomes much easier.