Používáme tuto službu každý den.

In Czech, the verb ending often already tells you who the subject is.

Používáme means we use / we are using, so the word my (we) is not necessary.

• (my) používáme = we use
• (vy) používáte = you use
• (oni) používají = they use

Czech usually leaves subject pronouns out unless they are needed for emphasis, contrast, or clarity.

Používáme is:

• present tense
• 1st person plural
• from the verb používat = to use

So grammatically it means we use or we are using, depending on context.

In this sentence, because of každý den (every day), it is understood as a habitual action: we use ... every day.

This is about aspect, which is very important in Czech.

• používat = imperfective → repeated, habitual, ongoing use
• použít = perfective → one completed use, a single act of using

Because každý den shows a repeated habit, Czech uses the imperfective verb:

• Používáme tuto službu každý den. = a regular repeated action

If you used použít, it would not fit this meaning well.

Also, the present tense of a perfective verb usually has a future meaning in Czech, not a normal present habitual meaning.

Because this noun phrase is the direct object of the verb, so it must be in the accusative case.

The dictionary forms are:

• tato = this (feminine nominative)
• služba = service (nominative)

But after používat (to use), the object changes to accusative:

• tato služba → nominative
• tuto službu → accusative

So:

• tuto is the accusative form of tato
• službu is the accusative form of služba

That is why the sentence uses tuto službu.

You can tell it from both the meaning and the ending.

The noun služba is a feminine noun ending in -a in its basic form. Many feminine nouns of this type form the accusative singular by changing:

• -a → -u

So:

• služba = nominative singular
• službu = accusative singular

Since it is the thing being used, it is the direct object, so accusative is exactly what you would expect.

Tuto is also accusative feminine singular.

In Czech, demonstratives and adjectives must agree with the noun they describe in:

• gender
• number
• case

Since službu is feminine singular accusative, the demonstrative must match it:

• tato služba = nominative
• tuto službu = accusative

This agreement is a basic rule in Czech grammar.

Každý den is the normal Czech way to say every day.

Here:

• každý = every
• den = day

This expression uses the accusative in a time expression meaning repeated time/frequency.

So Czech commonly says:

• každý den = every day
• každý týden = every week
• každý měsíc = every month

You may sometimes also see každého dne, but that sounds more formal or literary. Každý den is the normal everyday version.

No. Czech word order is much more flexible than English word order because case endings show grammatical roles.

The sentence as given:

Používáme tuto službu každý den.

is a neutral, natural order.

But you could also say:

• Tuto službu používáme každý den.
  This puts more focus on this service.

• Každý den používáme tuto službu.
  This puts more focus on every day.

All of these can be correct. The difference is mainly in emphasis and information structure, not basic meaning.

Yes, tuto is fully correct standard Czech. But in everyday speech, many speakers often prefer less formal-sounding alternatives such as:

• tu službu
• tuhle službu

So all of these can occur, depending on style and context:

• tuto službu = standard, clear, sometimes slightly more formal
• tu službu = very common in speech
• tuhle službu = common spoken form, often a bit more colloquial

A learner should definitely understand tuto službu, and it is perfectly fine to use it.

Here are the basic dictionary forms:

• používáme → používat = to use
• tuto → ten / ta / to or specifically tato in this feminine form = this
• službu → služba = service
• každý → každý = every
• den → den = day

Knowing the dictionary forms helps you recognize case and verb conjugation changes.

A simple English-friendly guide would be:

• Používáme ≈ poo-zhee-VAA-meh
• tuto ≈ TOO-toh
• službu ≈ SLOOZH-boo
• každý ≈ KAZH-dee
• den ≈ den

A few useful pronunciation notes:

• ž sounds like the s in measure
• á is a long vowel
• ý is a long ee-like sound
• Czech stress usually falls on the first syllable

So the sentence is stressed roughly like this:

POU-žíváme TU-to SLUŽ-bu KAŽ-dý den