Koncert začíná teď.

It is nominative singular, because it is the subject of the sentence — the thing that is starting.

Also, koncert is a masculine inanimate noun.

Začíná is the 3rd person singular present tense form of začínat.

It matches the subject koncert, which is singular:

• já začínám = I start / am starting
• ty začínáš = you start / are starting
• on/ona/ono začíná = he/she/it starts / is starting

Since koncert is treated like it, Czech uses začíná.

It can mean either, depending on context.

Czech does not have a separate continuous tense like English is starting. The simple present začíná can cover both:

• starts
• is starting

So Koncert začíná teď can naturally correspond to The concert starts now or The concert is starting now.

This is a question about aspect.

• začíná is imperfective
• začne is perfective

In a sentence like Koncert začíná teď, the imperfective often sounds natural because it presents the beginning as happening right now.

Koncert začne teď is also possible, but it can sound a bit more like The concert will begin now / at this moment. The difference is subtle, but learners should know that Czech often chooses aspect based on how the speaker views the action, not just on time.

Teď means now or right now.

It points to the present moment. In this sentence, it tells you that the concert is beginning at this very moment.

A close synonym is nyní, but teď is more common in everyday speech.

No, Czech word order is quite flexible.

Koncert začíná teď is a very natural, neutral order.

But you could also hear:

• Teď začíná koncert.
• Koncert teď začíná.

These all mean roughly the same thing, but the emphasis changes:

• Koncert začíná teď = neutral
• Teď začíná koncert = emphasis on now
• Koncert teď začíná = also possible, with teď highlighted a bit

So in Czech, word order often helps show focus and emphasis, not just grammar.

A rough guide:

• koncert ≈ KON-tsert
• začíná ≈ za-CHEE-naa
• teď is trickier: the ď is a soft d sound

A few useful pronunciation points:

• č sounds like English ch in church
• í and á are long vowels
• ď is a softened consonant that English does not have exactly

So the hardest word here is usually teď. It is best learned by listening and repeating, because the final soft consonant does not have a perfect English equivalent.

No. Czech usually does not add a subject pronoun when the subject is already stated.

Since koncert is already the subject, that is enough:

• Koncert začíná teď.

Adding a pronoun would be unnecessary here.

Yes.

Koncert začíná is a complete sentence and means The concert is starting / starts.

Adding teď makes the timing more explicit:

• Koncert začíná = The concert is starting
• Koncert začíná teď = The concert is starting now

So teď adds emphasis on the present moment.