U zamrzivaču imamo grašak i jednu vrećicu gljiva za sutra.

Because after u meaning in, Croatian uses the locative case when talking about location.

• zamrzivač = freezer (dictionary form, nominative)
• u zamrzivaču = in the freezer (locative)

A useful contrast:

• u zamrzivaču = in the freezer (location)
• u zamrzivač = into the freezer (movement, accusative)

So here, since the food is already there, u zamrzivaču is correct.

Imamo means we have.

The sentence literally works like:

• U zamrzivaču = In the freezer
• imamo = we have
• grašak i jednu vrećicu gljiva = peas and one bag of mushrooms
• za sutra = for tomorrow

Croatian often uses imati (to have) in the same kind of way English does when talking about what is available or what someone possesses.

So U zamrzivaču imamo... is a natural way to say We have ... in the freezer.

This is a very common question.

In Croatian, grašak is often treated like a mass or collective noun, even though in English we usually say peas in the plural.

So:

• grašak = peas / some peas / pea vegetables in general

Croatian does this with some foods where English prefers a plural form. So even though it looks singular, the meaning can still be peas in general, not just one pea.

Because jednu vrećicu is the direct object, and both words are in the accusative singular feminine.

The base forms are:

• jedna = one
• vrećica = bag

In the accusative singular feminine, they become:

• jednu
• vrećicu

The adjective/number word must agree with the noun, so both change together.

That is why you get:

• jedna vrećica = one bag (subject form)
• jednu vrećicu = one bag (object form, as in this sentence)

Because after a quantity/container noun like vrećica (bag), Croatian usually puts the thing inside in the genitive.

So:

• vrećica gljiva = a bag of mushrooms
• literally: bag of mushrooms

Here:

• gljive is the basic plural form: mushrooms
• gljiva is the genitive plural

This is very common in Croatian:

• čaša vode = a glass of water
• boca vina = a bottle of wine
• kilogram krumpira = a kilo of potatoes
• vrećica gljiva = a bag of mushrooms

So gljiva is not singular here — it is genitive plural.

Because the sentence is talking about:

• an unspecified amount of peas
• exactly one bag of mushrooms

So:

• grašak = just peas / some peas
• jednu vrećicu gljiva = one bag of mushrooms

Croatian does not need an article like some or the, so grašak by itself can mean peas in a general, unspecified amount.

If the speaker wanted to be more specific about the peas, they could add a quantity, but it is not necessary here.

Za sutra means for tomorrow.

• za = for
• sutra = tomorrow

In this sentence, it means the food is intended for tomorrow — for tomorrow’s meal, use, or plan.

This is a very natural Croatian expression. For example:

• Imamo nešto za sutra. = We have something for tomorrow.
• Ostavi to za sutra. = Leave that for tomorrow.

Croatian word order is fairly flexible, so yes, you could change it.

The original:

• U zamrzivaču imamo grašak i jednu vrećicu gljiva za sutra.

Other possible versions include:

• Imamo grašak i jednu vrećicu gljiva u zamrzivaču za sutra.
• Grašak i jednu vrećicu gljiva imamo u zamrzivaču za sutra.

However, the original sounds very natural because it starts with the location u zamrzivaču, which sets the scene first: In the freezer, we have...

So the word order can change, but the original is a normal and idiomatic choice.

Because Croatian has no articles.

English says:

• in the freezer
• a bag of mushrooms

Croatian simply says:

• u zamrzivaču
• vrećicu gljiva

Whether something is a, the, or just general is understood from context.

That is one of the big differences between English and Croatian: Croatian relies much more on case endings and context than on articles.

You know it from the grammar and context.

The noun gljiva can be:

• nominative singular: a mushroom
• genitive plural: of mushrooms

In this sentence, after vrećicu (bag), the genitive is expected, so gljiva must mean of mushrooms.

So jednu vrećicu gljiva cannot naturally mean one bag mushroom or one bag of one mushroom. It clearly means one bag of mushrooms.

A rough pronunciation guide is:

u zamrzivaču ≈ oo zahm-rzee-VAH-choo

A few helpful points:

• u sounds like oo
• z is like English z
• č sounds like ch in church
• stress in Croatian is not usually marked in normal writing, so learners often just imitate native audio at first

Also:

• grašak ≈ GRAH-shak
• vrećicu ≈ VREH-chee-tsoo
• gljiva is tricky because of glj; roughly GLYEE-va or GLYI-va, depending on accent and speaker

If pronunciation is important for you, this sentence is a good one for listening practice because it contains several very typical Croatian sounds and endings.