El hombre trabaja en casa, por ejemplo.

El is the masculine singular definite article, meaning the.

• el hombre = the man
• It is used because hombre is a singular masculine noun.
• In Spanish, nouns usually need an article more often than in English.

If you wanted a man, you would say un hombre.

Spanish often leaves out subject pronouns because the verb ending already shows who the subject is.

• trabaja can mean he works, she works, or it works, depending on context.
• Since the sentence already has el hombre, adding él would usually be unnecessary.

So Spanish prefers:

• El hombre trabaja...

rather than

• El hombre él trabaja... ❌

Trabaja is the third person singular present tense of trabajar.

The present tense of trabajar is:

• yo trabajo = I work
• tú trabajas = you work
• él / ella / usted trabaja = he / she / you work
• nosotros trabajamos
• vosotros trabajáis
• ellos / ellas / ustedes trabajan

Because the subject is el hombre (he), the correct form is trabaja.

En casa means at home or at the house/home in the sense of location.

• trabaja en casa = works at home

A casa is usually used with movement toward home:

• va a casa = goes home

So:

• location: en casa
• direction/movement: a casa

In Spanish, en casa is a very common expression meaning at home.

• en casa usually refers to home in a general, natural way
• en la casa sounds more like in the house or inside the house, often with more emphasis on the building itself

So:

• Trabajo en casa = I work from home / at home
• Estoy en la casa = I am in the house

Both can be correct, but they are not used in exactly the same way.

Usually, en casa means at home.

It is often broader and more natural than English in the house. It can refer to being at one’s home generally, not just physically inside the building in a literal way.

In this sentence, trabaja en casa is most naturally understood as:

• he works at home
• or he works from home

Por ejemplo means for example, and it is quite flexible in Spanish. It can appear in different parts of the sentence.

Here it comes at the end to add an example after the main idea:

• El hombre trabaja en casa, por ejemplo.

You could also see:

• Por ejemplo, el hombre trabaja en casa.

Both are possible. The difference is mostly about emphasis and style, not basic meaning.

It is very common and usually correct to use a comma before por ejemplo when it is inserted like a comment or afterthought.

• El hombre trabaja en casa, por ejemplo.

The comma helps show a pause, like for example in English.

If por ejemplo begins the sentence, it is also normally followed by a comma:

• Por ejemplo, el hombre trabaja en casa.

In standard Spanish, the h is silent.

So hombre is pronounced roughly like:

• OM-breh

A few useful points:

• the h is not pronounced
• the o is a clear short vowel
• the br is pronounced together
• the final e is pronounced, not silent

So it is not like English home-bray or hum-bur.

Yes. In many contexts, especially today, trabajar en casa can naturally mean to work from home.

Depending on context, it may mean:

• he works at home
• he works from home

If you want to be especially clear about remote work, Spanish speakers may also say:

• trabaja desde casa = he works from home

But trabaja en casa is still very natural.

Yes, but the original order is the most neutral.

Normal order:

• El hombre trabaja en casa.

Spanish can sometimes move parts around for emphasis, for example:

• En casa trabaja el hombre.

This sounds more marked and would usually be used only in a special context. For learners, the basic order subject + verb + place is the safest choice.

Yes. Hombre is a masculine noun, and it refers to a male person.

That is why it takes:

• el hombre
• not la hombre ❌

In Spanish, grammatical gender affects articles and sometimes adjectives too. So if you added an adjective, it would also usually be masculine singular:

• El hombre alto trabaja en casa. = The tall man works at home.