Zamjenski let je sutra.

Zamjenski means replacement, substitute, or alternative, depending on context. In this sentence, zamjenski let means a replacement flight or the replacement flight.

So the phrase suggests that an original flight has been changed, canceled, or replaced, and this is the new one.

Because Croatian adjectives must agree with the noun they describe in gender, number, and case.

Here:

• let = flight
• let is masculine singular
• so the adjective must also be masculine singular
• therefore: zamjenski let

If the noun were feminine, the adjective would change, for example:

• zamjenska karta = replacement ticket

It is in the nominative case.

That is because zamjenski let is the subject of the sentence:

• Zamjenski let = the replacement flight
• je = is
• sutra = tomorrow

So literally: The replacement flight is tomorrow.

Je is the 3rd person singular present tense of the verb biti = to be.

So:

• ja sam = I am
• ti si = you are
• on/ona/ono je = he/she/it is

In this sentence, je means is.

In normal standard Croatian, no. You usually need it here.

So:

• Zamjenski let je sutra. = correct
• Zamjenski let sutra. = not a normal full sentence in standard Croatian

You may see the verb omitted in headlines, notes, or very informal speech, but for learners, it is best to keep je.

Because sutra is already a time adverb meaning tomorrow.

Croatian often uses time words directly, without a preposition:

• danas = today
• sutra = tomorrow
• jučer = yesterday

So:

• Let je sutra. = The flight is tomorrow.

You do not need a word like on or at before sutra.

No. Croatian does not have articles like a and the.

So zamjenski let can mean:

• a replacement flight
• the replacement flight

Which one is meant depends on the context. In many real situations, if both speaker and listener know which flight is being discussed, English would naturally translate it as the replacement flight.

No, Croatian word order is fairly flexible. Zamjenski let je sutra is natural and neutral, but other orders are possible for emphasis.

For example:

• Zamjenski let je sutra. = neutral
• Sutra je zamjenski let. = emphasizes tomorrow
• Zamjenski je let sutra. = also possible, but less neutral

The basic meaning stays similar, but the focus changes slightly.

Yes, it is natural. Croatian often uses to be + time expression in cases where English might use a fuller phrase.

So Zamjenski let je sutra is a normal way to say that the replacement flight is scheduled for tomorrow.

If you wanted to be more explicit, you could say something like:

• Zamjenski let polazi sutra. = The replacement flight departs tomorrow.

But the original sentence is perfectly normal.

A rough guide is:

ZAHM-yehn-skee

A few points:

• z sounds like the z in zoo
• a is like a in father
• mj is pronounced together, roughly like my in myes...
• e is like e in met
• ski sounds like skee

Also:

• let is pronounced roughly let with a short e, not like English late

Sutra is an adverb of time. It tells you when something is.

So the structure is:

• Zamjenski let = subject
• je = verb
• sutra = time expression / adverbial

This is very common in Croatian:

• Sastanak je sutra. = The meeting is tomorrow.
• Ispit je u petak. = The exam is on Friday.

Yes. Zamjenski often has the broader sense of replacement, substitute, stand-in, backup, or alternate, depending on context.

For example:

• zamjenski dio = replacement part / spare part
• zamjenski učitelj = substitute teacher
• zamjenski let = replacement flight / alternate flight

So the exact English translation may vary, but the core idea is that something is taking the place of something else.

You negate je by changing it to nije:

• Zamjenski let nije sutra. = The replacement flight is not tomorrow.

That is the standard negative form of je.

A simple yes/no question is:

• Je li zamjenski let sutra? = Is the replacement flight tomorrow?

This is a very common way to form questions in Croatian.

In casual speech, people may also say:

• Zamjenski let je sutra?

with rising intonation, but Je li... is the clearest standard form for learners.