Moj muž radi u gradu, a ja radim kod kuće.

In Croatian, possessive adjectives like moj / moja / moje must agree with the gender, number, and case of the noun they describe.

• muž (husband) is masculine, singular, nominative.
• The matching form of moj for a masculine singular noun in the nominative is moj.

So:

• moj muž = my husband (correct)
• moja is for feminine singular nominative (e.g. moja žena – my wife)
• moje is for neuter singular nominative (e.g. moje dijete – my child)

That’s why only moj muž is correct here.

Both come from the verb raditi (to work), but they are different persons (subjects):

Present tense of raditi (singular):

• ja radim – I work / I am working
• ti radiš – you work (singular, informal)
• on/ona/ono radi – he/she/it works

In the sentence:

• Moj muž radi – he works (3rd person singular)
• ja radim – I work (1st person singular)

So radi = “he/she works”, radim = “I work”.

Grammatically, ja is not necessary; Croatian is a pro‑drop language, so subject pronouns are often omitted because the verb ending (-m in radim) already shows that the subject is I.

• Neutral, normal: Radim kod kuće. – I work at home.
• With ja: Ja radim kod kuće. – I work at home (with a bit more emphasis on I).

In your sentence:

• Moj muž radi u gradu, a ja radim kod kuće.
  Emphasises the contrast: my husband vs I.

So yes, you can omit ja, but keeping it adds a natural contrast and is very common in this kind of sentence.

The preposition u can take either the accusative or the locative case, depending on meaning:

• u + accusative → movement into something
  
  • Idem u grad. – I’m going to the city.
• u + locative → location in / inside something
  
  • Radim u gradu. – I work in the city.

In Moj muž radi u gradu, we’re talking about where he works (location), not where he is going, so we use the locative:

• grad → gradu (locative singular)
• hence: u gradu = “in the city”

Gradu is the locative singular of grad (city).

The basic declension (singular) of grad is:

• Nominative: grad (subject) – Grad je velik. (The city is big.)
• Genitive: grada – nema grada (there is no city)
• Dative: gradu – idem gradu u posjet (I go to the city in visit – somewhat formal/archaic)
• Accusative: grad – vidim grad (I see the city)
• Locative: gradu – u gradu (in the city)
• Instrumental: gradom – s gradom (with the city)

With the preposition u meaning “in”, we use the locative, so:

• u gradu = in the city.

All three exist, but they have different nuances:

• kod kuće

  • idiomatic “at home”
  • focuses on the idea of home as a personal place
  • Radim kod kuće. – I work at home.

• u kući

  • literally “in the house”, inside the building
  • more physical location, not necessarily your own home
  • U kući je hladno. – It’s cold in the house.

• kući (without a preposition)

  • dative/locative form of kuća, used in a few fixed patterns
  • Idem kući. – I’m going home. (direction)
  • Sam kući. (colloquial) – I’m at home.

In your sentence, kod kuće is the natural choice to express “at home” in the sense of “not out somewhere, but at home”.

The conjunction a can often be translated as “and”, “while”, or a mild “but”, usually with a feeling of contrast or comparison between the two parts.

In your sentence:

• Moj muž radi u gradu, a ja radim kod kuće.
  → My husband works in the city, while I work at home.

Differences:

• i = simple “and”, just adding information, no contrast

  • Moj muž radi u gradu i ja radim u gradu. – My husband works in the city and I work in the city.

• a = “and / while / whereas”, often contrasting

  • Moj muž radi u gradu, a ja radim kod kuće. – My husband works in the city, while I work at home.

• ali = stronger “but” (clear opposition)

  • Moj muž radi u gradu, ali ja ne radim. – My husband works in the city, but I don’t work.

Here a nicely highlights the contrast: city vs home.

Yes. Croatian word order is relatively flexible, and both are correct:

• Moj muž radi u gradu, a ja radim kod kuće.
• Ja radim kod kuće, a moj muž radi u gradu.

Both mean the same thing. The first position usually carries slightly more emphasis:

• First version highlights Moj muž (my husband) first.
• Second version highlights Ja (I) first.

You can also drop ja:

• Moj muž radi u gradu, a radim kod kuće. – still correct, slightly less emphatic on I.

Yes. Croatian has one present tense for both:

• Moj muž radi u gradu.

  • He works in the city. (habitually)
  • He is working in the city. (currently)

• Ja radim kod kuće.

  • I work at home.
  • I am working at home.

Context usually tells you whether it’s a general fact or something happening right now. There is no separate “-ing” form like English is working.

In the present tense, Croatian verbs do not change for gender, only for person and number:

• ja radim – I work (man or woman)
• on radi – he works
• ona radi – she works

So radim is the same whether the speaker is male or female.

Gender does show up in many past tense forms, for example:

• Moj muž je radio. – My husband worked. (masculine)
• Ja sam radila. – I worked. (if the speaker is female)
• Ja sam radio. – I worked. (if the speaker is male)

But in your sentence (present tense), there is no gender change in the verb.

Yes. Suprug is another word for husband:

• Moj suprug radi u gradu, a ja radim kod kuće.

Differences:

• muž
  • very common, everyday, neutral
• suprug
  • a bit more formal or polite, often used in official contexts, documents, formal speech

Both are correct, and the grammar around them (like moj muž / moj suprug) is the same.

Approximate pronunciation for English speakers:

• muž

  • roughly like “moozh”
  • ž is like the “s” in “measure” or “vision”
  • one syllable: muž

• grad

  • g as in “go”
  • r is a tapped/rolled r (like in Spanish or Scottish English)
  • a as in “father”
  • d as in “dog”
  • one syllable: grad

Stress is usually on the first syllable, so both are stressed at the beginning.