Ananas je sladak i dobar uz jogurt.

Je is the 3rd person singular present form of biti (to be).

So:

• Ananas = pineapple
• je = is
• sladak i dobar uz jogurt = sweet and good with yogurt

Croatian usually needs this verb, just like English does here. So Ananas je sladak = Pineapple is sweet.

They are in the masculine singular form because ananas is a masculine singular noun.

Croatian adjectives must agree with the noun in:

• gender
• number
• case

Here:

• ananas is masculine
• singular
• nominative

So the adjectives are also masculine singular nominative:

• sladak = sweet
• dobar = good

If the noun changed, the adjective form would also change.

This is a very common learner question.

After the verb biti (to be), Croatian often uses the short adjective form in predicate position:

• Ananas je sladak.
• Jogurt je dobar.

That is why you see sladak rather than slatki.

Very roughly:

• sladak = the normal short predicate form
• slatki = long/definite form, often used before a noun or in more specific contexts

So in this sentence, sladak is the natural choice.

Croatian does not have articles like English a/an/the.

So:

• ananas can mean a pineapple, the pineapple, or just pineapple in a general sense
• the exact meaning depends on context

That is completely normal in Croatian.

Here uz means something like:

• with
• alongside
• together with
• goes well with

So dobar uz jogurt means that pineapple is good when eaten with yogurt or goes well with yogurt.

This is a very natural use of uz for food combinations.

Both can relate to with, but they are not used in exactly the same way.

• uz jogurt = with yogurt / together with yogurt / as an accompaniment to yogurt
• s jogurtom = with yogurt, but more literally together with yogurt

For food, uz is often very natural when talking about what goes well with something:

• dobro uz sir
• dobro uz meso
• dobro uz jogurt

So Ananas je sladak i dobar uz jogurt sounds idiomatic.

It actually is in the accusative, because uz usually takes the accusative case.

But jogurt is a masculine inanimate noun, and for many masculine inanimate nouns, the accusative singular looks the same as the nominative singular.

So:

• nominative: jogurt
• accusative: jogurt

They look identical, even though the case function is different.

Yes. Ananas is a masculine noun.

You can see that from the adjective agreement:

• Ananas je sladak
• not sladka or slatko

Many Croatian masculine nouns end in a consonant, and ananas follows that pattern.

Yes, Croatian word order is more flexible than English word order.

The neutral version is:

• Ananas je sladak i dobar uz jogurt.

But you could move things around for emphasis, for example:

• Ananas je dobar uz jogurt i sladak.
• Uz jogurt je ananas dobar i sladak.

Those are possible, but the original sentence is the most natural neutral order for a learner to use.

Because i means and, and here it simply joins two adjectives:

• sladak
• dobar

In Croatian, as in English, you normally do not put a comma before i in a simple two-item coordination like this.

So:

• Ananas je sladak i dobar uz jogurt. ✅

No. Here dobar means something more like:

• tasty
• pleasant
• a good match
• good to eat with yogurt

So this is about taste or food pairing, not moral goodness.

You replace je with nije:

• Ananas nije sladak. = Pineapple is not sweet.
• Ananas nije dobar uz jogurt. = Pineapple is not good with yogurt.

For the whole sentence:

• Ananas nije sladak i dobar uz jogurt.

Depending on what exactly you want to negate, Croatian may phrase it differently, but nije is the key form.

It is pronounced roughly AH-nah-nahs.

A few helpful points:

• Croatian a is a clear ah sound
• each vowel is usually pronounced clearly
• stress can vary by dialect and teaching style, but a learner approximation like AH-na-nas is good enough to start

Also:

• jogurt is roughly YOH-goort
• sladak is roughly SLAH-dak

Yes, you could.

• sladak = sweet
• ukusan = tasty, delicious

So ukusan uz jogurt would also sound natural. But dobar uz jogurt is simpler and very idiomatic, especially for beginners.

It could be either. Because Croatian has no articles, the sentence can mean:

• Pineapple is sweet and good with yogurt (general statement)
• The pineapple is sweet and good with yogurt (specific one)

Context tells you which meaning is intended.