الكهربائي هنا.

In standard Arabic, the verb to be is usually not expressed in the present tense in simple statements like this.

So:

الكهربائي هنا
literally looks like: the electrician here
but it means: The electrician is here

This kind of sentence is called a nominal sentence.

If you wanted a past or future meaning, then Arabic would normally use a verb, for example:

• كان الكهربائي هنا = The electrician was here
• سيكون الكهربائي هنا = The electrician will be here

الـ is the Arabic definite article, meaning the.

So:

• كهربائي = an electrician / electrician
• الكهربائي = the electrician

It is attached directly to the beginning of the word, not written separately.

Here, it is being used as a noun, meaning electrician.

But its form is closely related to an adjective. It comes from كهرباء meaning electricity, and the ending -يّ often creates an adjective meaning related to something.

So كهربائي can mean things like:

• electrician when referring to a person
• electrical in some contexts

In this sentence, because it refers to a person and stands as the subject, it means the electrician.

هنا means here, and it is an adverb of place.

It tells you where someone or something is.

In this sentence, هنا is the part that gives the location:

• الكهربائي = the electrician
• هنا = here

So هنا functions like the predicate/complement: it tells us where the electrician is.

The subject is الكهربائي.

A simple way to see it is:

• الكهربائي = the person/topic being talked about
• هنا = the information given about that person

So the structure is basically:

[subject] + [location]

In traditional Arabic grammar, الكهربائي is the مبتدأ and هنا is the خبر.

Because هنا already means here by itself.

English often uses prepositions in many place expressions, but Arabic does not need one here.

So:

• هنا = here
• not in here or at here

That is why الكهربائي هنا is complete as it is.

Yes, you can, but the effect is a little different.

• الكهربائي هنا is the more neutral way to say The electrician is here
• هنا الكهربائي puts extra attention on here

So reversing the order can sound more emphatic or context-driven, something like:

• The electrician is here
• Here is the electrician
• The electrician is here, not somewhere else

For a learner, the original order الكهربائي هنا is the safest basic pattern.

A very common formal way is:

يوجد كهربائي هنا
= There is an electrician here

You may also see:

هنا كهربائيٌّ

In formal Arabic, starting a sentence directly with an indefinite noun is often less natural than using a different structure, so يوجد كهربائي هنا is especially useful for learners.

Yes.

In الكهربائي, the ل of الـ is pronounced because ك is a moon letter.

So the article stays audible:

• al-k...

It does not assimilate as it would with a sun letter.

So this word begins with something like al-ka..., not ak-ka...

In fully vocalized formal Arabic, the subject would be nominative, so you could write:

الكهربائيُّ هنا

The final -u sound on الكهربائيُّ shows the nominative case.

However, in normal Arabic writing:

• short vowels are usually not written
• in pause, speakers often do not pronounce the final case ending clearly

So learners will usually just see:

الكهربائي هنا

That is completely normal.