Prodavačka mi hned ukázala, kde mají čaj a kávu.

Yes. Prodavačka means shop assistant / saleswoman, and it is a feminine noun. In Czech, many feminine nouns end in -a.

Here:

• prodavač = male shop assistant / salesman
• prodavačka = female shop assistant / saleswoman

That feminine gender also affects the verb later in the sentence: ukázala is feminine singular past tense, matching prodavačka.

Mi means to me. It is the dative form of já (I).

Relevant forms:

• mě / mne = me (usually accusative)
• mi / mně = to me (dative)

In this sentence, the shop assistant showed something to me, so Czech uses the dative:

• Prodavačka mi ukázala... = The shop assistant showed me...

Also, mi is a short unstressed form, and these short forms usually appear early in the sentence.

Because mi is a clitic, meaning a short unstressed word that normally goes in the second position in a Czech clause.

So:

• Prodavačka mi hned ukázala...

This is very natural Czech word order:

1. first element: Prodavačka
2. second-position clitic: mi
3. then other elements like hned

English speakers often expect freer placement, but short pronouns like mi, ti, mu, se, si strongly prefer this early position.

Hned means right away, immediately, or at once.

So:

• Prodavačka mi hned ukázala... = The shop assistant immediately showed me...

It gives the sense that she did it without delay.

Ukázala is the past tense feminine singular form.

It agrees with prodavačka, which is feminine singular:

• ukázal = he showed
• ukázala = she showed

So:

• Prodavačka ukázala = The saleswoman showed

Also, ukázat is a perfective verb, so it expresses a completed action: she showed it, done.

By contrast:

• ukazuje = is showing / shows (present tense, imperfective)

In Czech, subject pronouns are often omitted when they are clear from context.

So instead of saying:

• Ona mi hned ukázala...

Czech very naturally just says:

• Prodavačka mi hned ukázala...

The noun prodavačka already tells you who did the action, and the verb form ukázala also shows feminine singular.

Good question. Czech past tense is historically made from an l-participle plus forms of být (to be), but in the third person the auxiliary is normally omitted.

So in practice:

• ukázal jsem = I showed
• ukázal jsi = you showed
• ukázal / ukázala = he / she showed

That means ukázala by itself already means she showed.

Because kde mají čaj a kávu is a subordinate clause.

Czech normally separates subordinate clauses with a comma:

• Prodavačka mi hned ukázala, kde mají čaj a kávu.

Literally, it is something like:

• The shop assistant immediately showed me where they have tea and coffee.

Any clause introduced by words like kde (where), že (that), když (when), protože (because) often needs a comma.

Here mají does not necessarily mean specific people. Czech often uses they in a general sense for places, shops, restaurants, offices, etc.

So:

• kde mají čaj a kávu literally = where they have tea and coffee
• natural English meaning = where the tea and coffee are / where they keep the tea and coffee / where the tea and coffee section is

This is a very common Czech way to talk about what a shop, restaurant, or business offers or keeps in stock.

Because both nouns are direct objects of mají, so they are in the accusative case, but different noun genders behave differently.

• čaj is masculine inanimate, and its accusative singular is the same as the nominative:
  • čaj → čaj
• káva is feminine, and its accusative singular changes:
  • káva → kávu

So:

• mají čaj = they have tea
• mají kávu = they have coffee

This is a very important Czech pattern:

• many masculine inanimate nouns stay unchanged in the accusative singular
• many feminine nouns in -a change to -u

Yes, but it is a little different in meaning and feel.

• kde mají čaj a kávu = where they keep/sell tea and coffee; very natural in a shop context
• kde je čaj a káva = where the tea and coffee are; also understandable, but a bit more literal

In a store, Czech often prefers the version with mají, because it sounds like where they have/stock those items.

Some parts can change, but not completely freely.

The given sentence is very natural:

• Prodavačka mi hned ukázala, kde mají čaj a kávu.

Why it works well:

• mi sits early as a clitic
• hned comes naturally before the main verb or near it
• the kde clause comes after ukázala

You might see small variations for emphasis, but not all of them sound equally natural. For example:

• Prodavačka mi ukázala hned, kde mají čaj a kávu.
  Possible, but the emphasis shifts slightly.
• Mi prodavačka hned ukázala...
  Not natural as a neutral sentence opening.

So yes, Czech word order is flexible, but it still follows strong patterns, especially with short pronouns like mi.

Not necessarily. It simply means where the tea and coffee are / where they keep tea and coffee. In a real shop, that could mean:

• both are in the same aisle or section
• they are near each other
• or the speaker is just generally indicating that part of the shop

The sentence does not strictly tell us whether the tea and coffee are on the exact same shelf. It just identifies the relevant location in the store.