Je teprve osm hodin.

Here teprve means only, still only, or as early as.

It adds the idea that eight o’clock is earlier than someone expected or not late yet.

So Je teprve osm hodin is not just a neutral time statement. It has a nuance like:

• It’s only eight
• It’s still only eight
• It’s as early as eight

A very useful contrast is:

• teprve = only / not yet very late
• už = already

So:

• Je teprve osm hodin. = It’s only eight.
• Už je osm hodin. = It’s already eight.

Czech does not need a dummy subject like English it in sentences about time, weather, and similar expressions.

English says:

• It is eight o’clock.

Czech simply says:

• Je osm hodin.

So je here means is, but there is no separate word for it.

This is completely normal in Czech. You should not try to add to in a neutral time expression.

• natural: Je osm hodin.
• not the normal neutral form: To je osm hodin.

To je... usually points to something or gives special emphasis, not just the ordinary statement of the time.

This is one of the trickier grammar points for learners.

In Czech, number phrases behave differently depending on the numeral.

With time expressions:

• je jedna hodina
• jsou dvě hodiny
• jsou tři hodiny
• jsou čtyři hodiny
• je pět hodin
• je osm hodin
• je deset hodin

So with 5 and higher, Czech normally uses singular je, not jsou.

That is why Je teprve osm hodin is correct.

A simple pattern to remember:

• 1 → singular
• 2–4 → plural
• 5+ → usually singular verb with the number phrase

Because after numbers 5 and higher, the counted noun usually goes into the genitive plural.

So:

• jedna hodina
• dvě hodiny
• tři hodiny
• čtyři hodiny
• pět hodin
• osm hodin

That is why the sentence has hodin.

This is not special only for time. It is a general Czech pattern:

• dvě knihy = two books
• pět knih = five books

The same thing happens here:

• osm hodin = eight hours / eight o’clock

In time-telling, Czech literally uses the word hours, where English uses o’clock or often nothing at all.

Yes. In everyday speech, Je teprve osm is very common and completely natural.

Since the context is clearly clock time, hodin can be omitted.

So both are fine:

• Je teprve osm.
• Je teprve osm hodin.

The version with hodin is just a little more explicit or a bit fuller in style.

Not completely. Czech word order is flexible, but different orders can sound more or less natural and can shift the emphasis.

The most neutral version is:

• Je teprve osm hodin.

You may also hear:

• Teprve je osm hodin.

This puts a bit more emphasis on teprve.

A version like:

• Je osm hodin teprve

is much less natural in ordinary speech and sounds marked.

So for a learner, the safest default is:

• Je teprve osm hodin.

A few useful examples:

• Je jedna hodina.
• Jsou dvě hodiny.
• Jsou tři hodiny.
• Jsou čtyři hodiny.
• Je pět hodin.
• Je sedm hodin.
• Je osm hodin.
• Je dvanáct hodin.

If you keep this pattern in mind, you will avoid a very common mistake with je / jsou.

In Czech, yes-no questions are often made just by intonation, so the word order can stay the same:

• Je teprve osm hodin?

That means:

• Is it only eight o’clock?

You could also ask more generally:

• Kolik je hodin? = What time is it?

That is the standard Czech question for asking the time.

Use už instead of teprve:

• Už je osm hodin.
• Je už osm hodin.

Both mean It’s already eight o’clock.

The difference is mostly emphasis:

• Už je osm hodin. = stronger emphasis on already
• Je už osm hodin. = also correct and natural

So the contrast is:

• Je teprve osm hodin. = It’s only eight.
• Už je osm hodin. = It’s already eight.