Dám mazivo na řetěz.

Dám is the 1st person singular form of the verb dát.

• dát = a perfective verb, often meaning to put, to give, or to apply depending on context
• dám = I will put / I’ll apply / I’ll give

In Czech, a perfective verb like dát does not normally describe an ongoing present action. Its present-tense forms usually refer to a future completed action.

So:

• dám mazivo na řetěz = I’ll put lubricant on the chain
• dávám mazivo na řetěz = I am putting / I put lubricant on the chain (imperfective, ongoing or habitual)

A learner often notices that dám looks like present tense, but in meaning it is effectively future because of the perfective aspect.

Czech usually omits subject pronouns when they are clear from the verb ending.

Here, dám already tells you the subject is I:

• dám = I will put
• dáš = you will put
• dá = he/she/it will put

So Já dám mazivo na řetěz is possible, but já is usually added only for emphasis, contrast, or clarity.

Mazivo is the direct object, so it is in the accusative case.

However, mazivo is a neuter noun, and many neuter nouns have the same form in nominative and accusative singular.

So:

• nominative: mazivo
• accusative: mazivo

That is why it appears unchanged even though it is functioning as the object.

Mazivo is a fairly general word meaning lubricant or lubricating substance.

Depending on context, it could refer to:

• oil
• grease
• chain lube
• some other lubricant

So it is broader than just oil. In a bicycle or mechanical context, mazivo is a natural technical word for lubricant.

Because na can take different cases depending on meaning.

Here, na means something like onto / onto the surface of / onto in the sense of applying something to a target. That use takes the accusative:

• na řetěz = onto the chain / on the chain

If you were talking about location, na would often take the locative:

• na řetězu = on the chain in a location sense

So the contrast is roughly:

• Dám mazivo na řetěz. = I’ll put lubricant onto the chain.
• Mazivo je na řetězu. = The lubricant is on the chain.

It is accusative singular.

The preposition na here requires the accusative because it expresses direction or application onto something.

The noun řetěz is masculine inanimate, and in the singular its accusative is the same as its nominative:

• nominative: řetěz
• accusative: řetěz

So even though the form does not change, the case is still accusative.

Yes, na is natural here if you mean put/apply lubricant on the chain.

Czech often uses na with actions of putting or applying something onto a surface or target:

• dát barvu na zeď = to put/apply paint on the wall
• dát krém na ruce = to put cream on one’s hands
• dát mazivo na řetěz = to put lubricant on the chain

It would sound less natural to use a preposition meaning into or inside, because a chain is not being treated as a container.

The sentence is understandable and natural enough, but in everyday speech a Czech speaker might often choose a more specific verb.

For example:

• Namažu řetěz. = I’ll lubricate the chain.
• Dám na řetěz mazivo. = I’ll put lubricant on the chain.

Dám mazivo na řetěz is fine, but namažu řetěz is often more idiomatic because it expresses the whole action directly with a verb meaning to smear / lubricate.

Yes. Czech word order is fairly flexible, and changing it often changes emphasis, not the core meaning.

Possible variants:

• Dám mazivo na řetěz. = neutral
• Na řetěz dám mazivo. = emphasis on the chain
• Mazivo dám na řetěz. = emphasis on the lubricant

The most neutral version is usually the original one, but the others are also possible depending on context.

You know from the context and from the rest of the sentence.

The verb dát is very broad. It can mean:

• give: Dám ti knihu. = I’ll give you a book.
• put: Dám to na stůl. = I’ll put it on the table.
• apply: Dám mazivo na řetěz. = I’ll put/apply lubricant on the chain.

So the meaning is not fixed in isolation. Czech uses dát in many everyday situations where English would choose different verbs.

The sound ř is one of the most famous difficult Czech sounds. It is not found in English.

A rough description:

• it is like an r and a zh sound produced together
• it is a raised, fricative r
• in řetěz, it is the voiced version

You do not need perfect pronunciation right away. A common beginner strategy is:

1. first learn to say a normal Czech r
2. then try adding a slight zh-like friction to it

Even if you pronounce it closer to r, people will usually still understand you.

In Czech, stress is usually on the first syllable of each word.

So:

• DÁM
• MAzivo
• na
• ŘEtěz

The important point for English speakers is that Czech stress is much more regular than English stress. You generally do not move the stress around unpredictably.

Because Czech forms the future in different ways depending on the verb type.

With perfective verbs, the present-tense form usually has future meaning:

• dám = I will put

With many imperfective verbs, Czech uses a future form with být:

• budu dávat = I will be putting / I will put repeatedly

So Czech does not need a separate word exactly like English will in this sentence. The future meaning is built into the aspect and verb form.