Osiguranje i tehnički pregled su skupi.

to be

Breakdown of Osiguranje i tehnički pregled su skupi.

• i: and
• skup: expensive
• osiguranje: insurance

Questions & Answers about Osiguranje i tehnički pregled su skupi.

Why is there su in the sentence?

Su is the 3rd person plural present tense of biti (to be).

So:

• ja sam = I am
• ti si = you are
• on/ona/ono je = he/she/it is
• mi smo = we are
• vi ste = you are
• oni/one/ona su = they are

In Osiguranje i tehnički pregled su skupi, the subject is made of two things joined by i:

• osiguranje = insurance
• tehnički pregled = technical inspection

Because the subject is plural in meaning, Serbian uses su = are.

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Why is skupi plural?

Because the sentence has a compound subject:

• osiguranje
• tehnički pregled

They are joined by i (and), so together they mean two things, not one. That is why the predicate adjective must also be plural:

• skup = expensive (masculine singular)
• skupa = expensive (feminine singular)
• skupo = expensive (neuter singular)
• skupi = expensive (plural, here masculine/mixed)

So:

• Tehnički pregled je skup. = The technical inspection is expensive.