To je pojistná událost.

Here to is the neuter demonstrative pronoun this/that/it.

In sentences like To je X, Czech very often uses to to identify something:

• To je dům. = That/This is a house.
• To je problém. = That is a problem.

So to does not have to match the gender of událost. It is a very common neutral way to say this is / that is.

Je is the 3rd person singular present of být (to be), so it means is.

• To je ... = This/That is ...

It is singular because the sentence is identifying one thing as one event. If you were talking about multiple events, you would normally use the plural:

• To jsou pojistné události. = Those are insured events.

It is in the nominative.

After být in an identifying sentence, Czech commonly uses the nominative:

• To je učitel.
• To je chyba.
• To je pojistná událost.

So both pojistná and událost are nominative singular here.

Because pojistná is an adjective agreeing with událost.

In Czech, adjectives must match the noun in:

• gender
• number
• case

Událost is feminine singular nominative, so the adjective must also be feminine singular nominative:

• masculine: pojistný
• feminine: pojistná
• neuter: pojistné

So:

• pojistná událost = feminine noun + matching feminine adjective

Yes. Událost is feminine.

A very common Czech pattern is that nouns ending in -ost are feminine, for example:

• radost = joy
• možnost = possibility
• společnost = company/society
• událost = event

So even though it does not end in -a, it is still feminine and takes feminine adjective forms like pojistná.

It is very much a set term in insurance language.

Literally, it looks like insurance event or insured event, but in real usage it usually means a specific kind of event that is covered under an insurance policy and triggers the insurer’s responsibility.

So a learner should treat pojistná událost as a standard insurance expression, not just as a random adjective + noun combination.

Because Czech has no articles.

English says:

• This is an insured event.
• This is the insured event.

Czech does not use separate words like a/an/the. The exact meaning is understood from context.

So:

• To je pojistná událost.

can mean something like This is an insured event or, depending on context, This is the insured event.

Yes.

All of these are possible:

• To je pojistná událost.
• Toto je pojistná událost.
• Tohle je pojistná událost.

The differences are mostly about style and emphasis:

• to = very common, neutral
• toto = more formal or explicit
• tohle = common in everyday speech, a bit more like this here

In many situations, To je ... is the most natural basic pattern.

A simple pronunciation guide is:

to ye poy-ist-naa oo-daa-lost

A few key points:

• j in Czech sounds like English y in yes
  • so je sounds roughly like ye
• pojistná has stress on the first syllable: PO-jist-ná
• událost also has stress on the first syllable: U-dá-lost
• á is a long vowel, so it is held a little longer:
  • pojistná
  • událost

Czech stress is normally on the first syllable of the word, unlike English.

Yes, but To je pojistná událost is the most straightforward neutral order.

Czech word order is more flexible than English because case endings carry a lot of grammatical information. You may also hear variations for emphasis, for example:

• To je pojistná událost. = neutral
• Pojistná událost to je. = marked/emphatic, less neutral

For a learner, the basic pattern To je + noun phrase is the safest one to use.

Very simply:

• To není pojistná událost. = This/That is not an insured event.
• Je to pojistná událost? = Is this/that an insured event?

So the main changes are:

• je → není for negation
• move je to the front for a yes/no question

That gives you a very useful mini-pattern:

• To je ...
• To není ...
• Je to ...?