La betono enhavas cementon.

La is the definite article, meaning the.

So:

• betono = concrete
• la betono = the concrete

Esperanto has only one article, la, and it does not change for gender, number, or case.

Whether you use la or not depends on meaning, just like in English. If you mean concrete in a general sense, you might also see Betono enhavas cementon. If the sentence is about some specific concrete already being discussed, La betono is natural.

The -n ending marks the direct object in Esperanto.

In this sentence:

• La betono = the subject, the thing doing the action
• enhavas = contains
• cementon = the direct object, the thing being contained

So:

• cemento = cement
• cementon = cement as a direct object

This is called the accusative ending.

A very useful pattern is:

• -o = noun
• -on = noun used as a direct object

Because betono is the subject, not the object.

In Esperanto, the -n usually goes on the noun that receives the action, not the noun that performs it.

Here, the concrete is doing the containing, so it stays:

• la betono

The cement is what is contained, so it becomes:

• cementon

Compare:

• La betono enhavas cementon. = The concrete contains cement.
• La cemento enhavas betonon. = The cement contains concrete.

The -n helps show who is doing what.

Enhavas means contains.

It can be understood as being built from:

• en = in
• havi = to have

So enhavi literally suggests something like to have in, which becomes to contain.

Then enhavas is the present tense form:

• enhavi = to contain
• enhavas = contains / is containing

This kind of word-building is very common in Esperanto and is one of the language’s most useful features.

Because -as is the Esperanto ending for the present tense.

So:

• enhavi = to contain
• enhavas = contains / contain

Esperanto verb endings are very regular:

• -as = present
• -is = past
• -os = future
• -us = conditional
• -u = command / wish
• -i = infinitive

Examples:

• La betono enhavas cementon. = The concrete contains cement.
• La betono enhavis cementon. = The concrete contained cement.
• La betono enhavos cementon. = The concrete will contain cement.

Yes. In Esperanto:

• betono = concrete
• cemento = cement

This matches an important real-world distinction in English too:

• cement is one ingredient
• concrete is the finished material that contains cement, usually along with sand, gravel, and water

So the sentence is logically correct:

La betono enhavas cementon.
= The concrete contains cement.

This is also a good reminder not to translate by guesswork just from similar-looking words.

Yes, ordinary nouns in Esperanto end in -o.

In this sentence:

• beton-o
• cement-o

That -o tells you the word is a noun.

Other very common endings are:

• -a = adjective
• -e = adverb
• -i = infinitive verb

So Esperanto makes word class very visible.

For example:

• betono = concrete
• betona = concrete, made of concrete
• enhavi = to contain
• enhave is not a common everyday form here, but the ending would still mark it as an adverb

Yes, Esperanto word order is more flexible than English because the -n ending helps show the direct object.

So these can mean the same thing:

• La betono enhavas cementon.
• Cementon enhavas la betono.

However, the normal and most neutral order is still:

subject + verb + object

So La betono enhavas cementon is the most straightforward version for learners.

Even though Esperanto allows flexibility, it is usually best to start with the standard order unless you have a reason to emphasize something.

Because Esperanto does not need an extra helping verb like do/does for ordinary present-tense statements.

English says:

• The concrete contains cement.

or for emphasis:

• The concrete does contain cement.

Esperanto simply uses the verb form itself:

• La betono enhavas cementon.

If you want emphasis in Esperanto, you usually express it in some other way, not by adding a separate verb like does.

It would be grammatically correct, but it means something more specific:

• cementon = cement, in a general or indefinite sense
• la cementon = the cement, some specific cement already known from context

So:

• La betono enhavas cementon. = The concrete contains cement.
• La betono enhavas la cementon. = The concrete contains the cement.

The second version sounds less natural unless you are talking about a particular batch or type of cement already mentioned.

The root here is:

• beton- in betono
• cement- in cemento
• hav- in enhavas if you analyze it as en + hav + as

Esperanto words are often made from a root plus endings, and sometimes also prefixes or suffixes.

For this sentence:

• beton-o = concrete
• cement-o-n = cement + noun ending + accusative ending
• en-hav-as = in + have + present tense

Learning to spot roots and endings is one of the most helpful Esperanto skills, because it lets you understand and build many words quickly.

Enhavi is a normal and understandable verb for contain.

Depending on context, Esperanto speakers might also use other expressions, but enhavi is clear and standard.

For learners, it is a very good verb to know because it is easy to understand once you know:

• en = in
• havi = to have

So it is also a nice example of how Esperanto forms vocabulary in a logical way.