A szerszámok egy dobozban vannak, és a csavarok is ott maradnak.

A is the Hungarian definite article, meaning the.

So:

• a szerszámok = the tools
• a csavarok = the screws

Hungarian uses a before consonant sounds and az before vowel sounds:

• a doboz = the box
• az autó = the car

In this sentence, the speaker is talking about specific tools and specific screws, not just tools and screws in general.

Egy usually means a/an or one.

So:

• egy dobozban = in a box
• a dobozban = in the box

Here, egy dobozban presents the box as just some box, not necessarily a previously identified one.

This is a very common contrast in Hungarian:

• a könyv = the book
• egy könyv = a book

The ending -ban / -ben means in.

So:

• doboz = box
• dobozban = in a box

This is a case ending, and Hungarian often uses endings where English uses prepositions.

Examples:

• házban = in a house
• iskolában = in a school
• szobában = in a room

The choice between -ban and -ben follows vowel harmony. Since doboz has back vowels, it takes -ban.

Because the subject is plural.

• van = is
• vannak = are

So:

• A szerszám a dobozban van. = The tool is in the box.
• A szerszámok a dobozban vannak. = The tools are in the box.

Hungarian uses van/vannak in the present tense to express existence or location, much like English is/are.

That is true, but only in certain situations.

In Hungarian, the present-tense verb van/vannak is often omitted in sentences like:

• A ház nagy. = The house is big.
• A lány okos. = The girl is smart.

But when you are expressing location or existence, van/vannak is normally used:

• A könyv az asztalon van. = The book is on the table.
• A szerszámok egy dobozban vannak. = The tools are in a box.

So here vannak is necessary.

Is means also or too.

So:

• a csavarok is = the screws too / the screws also

A very important point: Hungarian is usually comes after the word it applies to.

Examples:

• Én is. = Me too.
• Péter is jön. = Peter is coming too.
• A csavarok is ott maradnak. = The screws also stay there.

This is different from English word order, where also often comes before the verb.

Because Hungarian places is directly after the element being marked as also/too.

So:

• A csavarok is ott maradnak. = The screws too stay there.

This tells us that the screws are being added to something already mentioned — here, the tools.

Compare:

• Péter is dolgozik. = Peter works too.
• Ott is maradnak. = They stay there too.
  This would emphasize there instead.

So the placement of is changes what is being highlighted.

Ott means there.

So:

• ott maradnak = they stay there / remain there

Even though the location was already introduced with egy dobozban, Hungarian can still use ott to refer back to that location, just like English can say there.

It helps connect the second clause to the first:

• The tools are in a box,
• and the screws stay there too.

Without ott, the sentence would still be possible in some contexts, but ott makes the reference to the same place clearer.

They do different jobs:

• vannak = are
• maradnak = stay / remain

So:

• A szerszámok egy dobozban vannak. = The tools are in a box.
• A csavarok is ott maradnak. = The screws also stay/remain there.

The first clause describes where the tools are. The second clause describes what happens with the screws: they remain in that place.

So maradnak adds the idea of continuing to be there, not just being there at one moment.

Because it is the third person plural form of the verb marad.

Basic forms:

• maradok = I stay
• maradsz = you stay
• marad = he/she/it stays
• maradunk = we stay
• maradtok = you (plural) stay
• maradnak = they stay

Since a csavarok is plural (the screws), the verb must also be plural:

• A csavar marad. = The screw stays.
• A csavarok maradnak. = The screws stay.

Both can be correct, but they have different emphasis.

• A szerszámok egy dobozban vannak.
  Neutral: The tools are in a box.

• Egy dobozban vannak a szerszámok.
  More emphasis on where they are: It is in a box that the tools are.

Hungarian word order is flexible, and it often reflects focus or emphasis rather than strict grammatical roles alone.

So the version in your sentence is a natural, neutral way to state the information.

Yes.

The verb marad can mean:

• stay
• remain
• sometimes be left

So ott maradnak can be understood as:

• they stay there
• they remain there

Which English version sounds best depends on context, but the Hungarian grammar is the same.

Yes, in normal usage és means and.

In this sentence:

• ..., és a csavarok is ott maradnak.
  = ..., and the screws stay there too.

It is the standard coordinating conjunction for linking words, phrases, and clauses.

Examples:

• Anna és Péter = Anna and Peter
• Eszem és iszom. = I eat and drink.

Yes, but it changes the emphasis.

• a csavarok is ott maradnak = the screws too stay there
• a csavarok ott is maradnak = the screws stay there too / they remain there as well

In the original sentence, is attaches to a csavarok, so the added element is the screws.

If you say ott is, then there is the element being marked as also.

This is a good example of how Hungarian word order and particle placement affect emphasis.

They are plural because they mean tools and screws, not just one tool or one screw.

Hungarian usually forms the plural with -k:

• szerszám = tool

• szerszámok = tools

• csavar = screw
• csavarok = screws

The exact form may include a linking vowel before -k, as in -ok, -ek, -ök, depending on the word and vowel harmony.

So here:

• szerszám + ok
• csavar + ok

give the plural forms used in the sentence.