Promítačka má dvě funkce.

Because funkce is a feminine noun.

In Czech, the word for two changes according to gender:

• dva for masculine inanimate and masculine animate in some contexts
• dvě for feminine and neuter

So:

• dva stoly = two tables
• dvě knihy = two books
• dvě okna = two windows

Since funkce is feminine, you say dvě funkce.

Má is the 3rd person singular form of the verb mít = to have.

So:

• já mám = I have
• ty máš = you have
• on / ona / ono má = he / she / it has

Here, the subject is promítačka, which is singular, so Czech uses má:

• Promítačka má dvě funkce. = The projector has two functions.

In Czech, nouns have grammatical gender, and promítačka is feminine because of both its form and its usage.

Nouns ending in -a are very often feminine, and promítačka follows that pattern. That means adjectives, numerals, and sometimes past-tense forms will agree with it as feminine.

For example:

• ta promítačka = that projector
• nová promítačka = a new projector

This grammatical gender does not mean the object is biologically female. It is just a feature of the noun.

It is in the nominative singular, because it is the subject of the sentence.

In Promítačka má dvě funkce, the thing doing the having is promítačka, so it stays in the nominative:

• promítačka = subject
• má = has
• dvě funkce = two functions

Here funkce is in the accusative plural, because it is the direct object of má.

However, with this noun, the form funkce looks the same in several cases and numbers. That is very common in Czech.

For this noun:

• singular nominative: funkce
• singular accusative: funkci
• plural nominative: funkce
• plural accusative: funkce

So in dvě funkce, the noun is plural, even though the form looks like the singular nominative.

Because Czech normally has no articles.

English says:

• a projector
• the projector

But Czech usually just says:

• promítačka

The exact meaning depends on context. In a sentence like this, promítačka could mean:

• a projector
• the projector
• sometimes just projector

You understand which one is meant from the situation, not from an article.

Yes, Czech word order is flexible, but the usual neutral order here is:

• Promítačka má dvě funkce.

That is a normal subject–verb–object order.

You could change the order for emphasis, for example:

• Dvě funkce má promítačka.
• Má promítačka dvě funkce.
  This can sound like a question in speech, depending on intonation.

Even when the word order changes, the cases help show what each word is doing. Still, the original sentence is the most natural neutral version.

A rough pronunciation guide is:

proh-MEE-tach-ka maa DVYE foonk-tseh

A few useful points:

• í and á are long vowels
• č sounds like ch in chair
• dvě is approximately dvye
• ce at the end of funkce sounds like tseh

If you want it word by word:

• Promítačka → proh-MEE-tach-ka
• má → maa
• dvě → dvye
• funkce → FOONK-tseh

It can be used for projector, but learners should know that projektor is also very common, especially in modern technical contexts.

Promítačka can sound a bit more informal, practical, or device-oriented, and in some contexts it may suggest a film projector or projecting machine. Projektor is often the more international-looking technical word.

So depending on context, you may hear either:

• Promítačka má dvě funkce.
• Projektor má dvě funkce.

Both can be understandable, but projektor is often the safer general word for modern equipment.

Because Czech usually does not use subject pronouns unless they are needed for emphasis or contrast.

The verb form má already tells you it is 3rd person singular, and the noun promítačka is present anyway, so no pronoun is necessary.

English often needs:

• It has two functions.

Czech usually just says:

• Má dvě funkce.
  if the subject is already clear

Or:

• Promítačka má dvě funkce.

Adding ona would usually sound emphatic or contrastive, not neutral.

The numeral changes, and the noun form may stay the same or change depending on the number.

• Promítačka má jednu funkci. = The projector has one function.
• Promítačka má dvě funkce. = The projector has two functions.
• Promítačka má tři funkce. = The projector has three functions.
• Promítačka má čtyři funkce. = The projector has four functions.
• Promítačka má pět funkcí. = The projector has five functions.

A very important Czech pattern is:

• after 1: singular
• after 2, 3, 4: usually plural
• after 5 and more: the noun usually goes into a genitive plural form

That is why funkce becomes funkcí after pět.