Doprava je zdarma a prodejce doručí pračku.

Because doprava is the subject of the first clause: Doprava je zdarma.

In Czech, the subject is normally in the nominative case. Here:

• doprava = transport / delivery / shipping
• je = is
• zdarma = free, for free

So doprava is simply the thing being described, which is why it stays in nominative.

No, zdarma is not an adjective here. It is an adverbial expression meaning for free or free of charge.

That is why Czech says:

• Doprava je zdarma.

rather than using an adjective agreeing with doprava.

You can think of it as similar to saying:

• Shipping is free of charge.

In Czech, zdarma does not change form for gender, number, or case.

In a normal full sentence, Czech usually keeps the verb být (to be) in the present tense:

• Doprava je zdarma.

However, in ads, headlines, or short label-like phrases, Czech often omits je:

• Doprava zdarma

That shorter version is extremely common on websites and in shops. But in a complete standard sentence, je is correct and natural.

Both words relate to selling, but they are not always the same in meaning or style.

• prodejce = seller, vendor, retailer
• prodavač = shop assistant / salesman

In a sentence about delivery, prodejce is often the better choice because it refers to the seller as a business or commercial party, not just a person working in a shop.

So:

• prodejce doručí pračku = the seller will deliver the washing machine

sounds very natural in a commercial context.

This is a very common Czech point. Doručí is from the perfective verb doručit.

In Czech, perfective verbs do not normally express a true present action. Their present-tense forms usually refer to the future.

So:

• doručí = will deliver

Compare:

• doručuje = is delivering / delivers regularly
• doručí = will deliver, deliver successfully/completely

The perfective verb focuses on the action as completed.

Because pračku is in the accusative singular. It is the direct object of doručí.

Base form:

• pračka = washing machine

Accusative singular:

• pračku

This happens because pračka is a feminine noun ending in -a, and many such nouns change like this:

• nominative: pračka
• accusative: pračku

So in the sentence:

• prodejce doručí pračku

the seller is delivering the washing machine, so the noun must be in the accusative.

Yes, you could. Czech word order is more flexible than English word order.

Both of these are grammatical:

• Doprava je zdarma a prodejce doručí pračku.
• Prodejce doručí pračku a doprava je zdarma.

The difference is mainly in emphasis and information flow.

The original version starts with shipping is free, so that idea is foregrounded first. That is very natural in advertising or product descriptions.

Czech does not have articles like English a/an and the.

So Czech simply says:

• prodejce
• pračku

and the exact meaning depends on context.

In English, you must choose:

• a seller
• the seller
• a washing machine
• the washing machine

In Czech, article-like meaning is usually understood from the situation, context, or word order.

Yes. In this sentence, a simply means and:

• Doprava je zdarma a prodejce doručí pračku.

It joins two clauses:

1. Doprava je zdarma
2. prodejce doručí pračku

Czech a is very common and straightforward here.

A simple pronunciation guide is:

• Doprava je zdarma a prodejce doručí pračku.
• roughly: DO-pra-va ye ZDAR-ma a PRO-day-tse do-ROO-chee PRACH-koo

A few useful notes:

• Stress in Czech usually falls on the first syllable of each word.
• ř does not appear here, so pronunciation is easier than in many Czech sentences.
• č in doručí and pračku sounds like ch in church.
• c in prodejce sounds like ts.

Sometimes yes, but the meaning changes slightly.

• doručí = will deliver
• přiveze = will bring / will bring by vehicle

Doručí sounds more neutral and business-like, and it focuses on delivery as a service.
Přiveze emphasizes the physical bringing of the item, often by car or truck.

For a seller and a large appliance like a washing machine, both can make sense, but doručí is often the more standard commercial choice.