Moja majka je danas mnogo umorna.

Moja means my. In Serbian, possessive words like moj / moja / moje change to agree with the noun they describe.

Because majka is:

• feminine
• singular
• in the nominative case here

the correct form is moja.

Compare:

• moj brat = my brother
• moja majka = my mother
• moje dete = my child

Here majka is the subject of the sentence, so it is in the nominative case, which is the basic dictionary form.

Serbian changes nouns depending on their role in the sentence:

• majka = mother, as subject
• majke = of the mother / mothers, or sometimes accusative plural depending on context
• majci = to the mother

In Moja majka je danas mnogo umorna, my mother is the one being described, so nominative majka is correct.

Je is the 3rd person singular present-tense form 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, majka is she, so Serbian uses je:

• Moja majka je umorna = My mother is tired.

Unlike in some Slavic languages, Serbian normally does use the present-tense verb to be in sentences like this.

This is a very common Serbian pattern. Short unstressed words, called clitics, often appear in the second position of the sentence or clause. Je is one of these.

So Serbian naturally says:

• Moja majka je danas mnogo umorna.

Even though English speakers may want to think of the sentence as:

• Moja majka danas je mnogo umorna

that version sounds unnatural in standard Serbian.

The clitic je likes to come early, usually after the first word or first phrase.

Danas means today. Its position is fairly flexible, but the sentence given is very natural:

• Moja majka je danas mnogo umorna.

You can also hear:

• Danas je moja majka mnogo umorna.
• Moja majka je mnogo umorna danas.

These all mean roughly the same thing, but the emphasis changes a little.

The version with danas after je is very neutral and common.

Literally, mnogo often means much / a lot, but before an adjective it can function like very.

So:

• mnogo umorna = very tired

This is natural Serbian. However, learners should know that Serbian also often uses:

• veoma umorna = very tired
• jako umorna = very tired

All three are possible, but they can feel slightly different:

• veoma = a bit more formal/neutral
• jako = very common in speech
• mnogo = also common and perfectly acceptable here

Adjectives in Serbian must agree with the noun they describe.

Since majka is feminine singular, the adjective must also be feminine singular:

• umoran = tired, masculine
• umorna = tired, feminine
• umorno = tired, neuter

So:

• Moj brat je umoran. = My brother is tired.
• Moja majka je umorna. = My mother is tired.

It is an adjective, but in this sentence it is used as part of the predicate, after the verb je.

In other words:

• majka = subject
• je = is
• umorna = tired

This is similar to English She is tired.

Serbian adjectives can appear:

1. before a noun
   
   • umorna majka = a tired mother
2. after the verb to be
   
   • majka je umorna = the mother is tired

Both are adjective use, but the second one is predicative.

Serbian has no articles like English a and the.

So majka can mean:

• mother
• the mother
• sometimes even a mother

The exact meaning comes from context.

In Moja majka, the possessive moja already makes it specific, so English naturally translates it as my mother without needing any article in Serbian.

Yes, that is possible, but it changes the feel.

• Moja majka je danas mnogo umorna. = explicitly My mother is very tired today.
• Majka je danas mnogo umorna. = Mother is very tired today or The mother is very tired today, depending on context

Serbian often omits words that are obvious from context, but if you want to clearly say my mother, then moja is the best choice.

Yes. Each word adds a piece of meaning.

• Moja majka je umorna. = My mother is tired.
• Moja majka je danas umorna. = My mother is tired today.
• Moja majka je mnogo umorna. = My mother is very tired.
• Moja majka je danas mnogo umorna. = My mother is very tired today.

So:

• danas adds time
• mnogo strengthens the adjective

Serbian word order is more flexible than English, but not completely free. This sentence can be rearranged for emphasis, especially around danas and mnogo, but the clitic je has restrictions.

Very natural:

• Moja majka je danas mnogo umorna.
• Danas je moja majka mnogo umorna.

Possible with different emphasis:

• Moja majka je mnogo umorna danas.

Less natural or problematic in standard Serbian:

• Moja majka danas je mnogo umorna.

So yes, word order can move, but not every arrangement sounds equally natural.

Yes, it sounds completely natural. A native speaker would easily say:

• Moja majka je danas mnogo umorna.

In everyday speech, you might also hear:

• Moja majka je danas jako umorna.
• Mama je danas mnogo umorna.

Using mama instead of majka makes it more personal and conversational:

• Mama je danas mnogo umorna. = Mom is very tired today.

So the original sentence is correct and natural, but slightly more neutral than a family-style everyday version with mama.