Present tense of 'biti' (to be): jesam / sam
'To be' has two present forms: a stressed full form (jesam, jesi, jeste, jesmo, jeste, jesu) and a short unstressed clitic (sam, si, je, smo, ste, su) used in normal sentences. The clitic cannot start a sentence and normally comes in second position.
Examples
- Ja sam student. I am a student.
- Ona je umorna. She is tired.
- Jesi li gladan? Are you hungry?
The full lesson
Everything in the video, in text.
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Here's a mistake that instantly marks you as a beginner in Serbian: starting a sentence with the word for 'am'. It simply can't go first — and learning why unlocks the most important verb in the language.
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The verb is 'biti' — 'to be'. It's the most common verb in Serbian: you need it to say who you are, how you feel, and where things are. And it has a twist most languages don't.
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Here's the twist. 'To be' has two present-tense forms for every person. There's a short, unstressed form — the everyday workhorse — and a long, stressed form you use for emphasis or to start a sentence. Same meaning, two shapes.
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Let's see the short forms in full. These are the ones you'll say nearly every sentence. Listen to how light and quick they are — they almost lean on the word before them. sam, si, je, smo, ste, su
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Here it is in action. 'I am a student.' The word 'sam' sits in second position, right after 'ja'. Ja sam student.
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Another one. 'She is tired.' The short form for 'is' is 'je' — again, second, leaning on the word before it. Ona je umorna.
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And in the plural: 'We are at home.' 'Smo' means 'are' for 'we', sitting neatly in second place. Mi smo kod kuće.
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Notice the pattern in all three: the short form never comes first. It's a clitic — a word too light to start a sentence — so it slides into second position. This second-position rhythm is one of the most important habits in Serbian.
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So this is the classic beginner trap. You can't say 'Sam Ana' to mean 'I'm Ana' — the clitic has nothing to lean on. Put a word in front of it, like 'ja', and now 'sam' has its second-position home. Ja sam Ana.
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But what if you do want to begin with 'to be' — to answer 'Yes, I am'? That's where the full, stressed form earns its keep. 'Jesam' can stand completely alone as a strong 'I am' or 'yes, I am'. Jesam.
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The full form is also how you ask many yes-no questions. 'Are you hungry?' opens with 'Jesi', followed by the little question word 'li'. Jesi li gladan?
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So think of it as a division of labour. Inside a normal statement, use the short form in second position. To start a sentence, answer 'yes I am', or add emphasis — reach for the full form.
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Lock in three things. 'To be' is 'biti'. The short form — sam, si, je, smo, ste, su — lives in second position and never starts a sentence. The full form — jesam, jesi, jeste — is for emphasis, questions, and standing alone.