L'amic és aquí.

It shows that the article el becomes l' before a word beginning with a vowel or silent h.

So:

• el amic → l'amic
• el home → l'home

This is called elision. In standard Catalan, l'amic is the correct form here.

Normally, no. In standard Catalan, when el comes before a vowel, it changes to l'.

So:

• correct: l'amic
• not standard here: el amic

A native speaker would expect l'amic.

És is the he/she/it is form of the verb ser.

The accent is important because it distinguishes és from es:

• és = is
• es = a reflexive/object pronoun, as in es renta

The accent also shows the vowel quality in standard spelling.

In Catalan, ser is very commonly used to say where someone or something is.

So L'amic és aquí is a normal, natural sentence.

English speakers often expect estar because of Spanish, but Catalan does not match Spanish exactly here. In many contexts of location, Catalan prefers ser:

• La Maria és a casa
• El llibre és aquí

You may also hear estar in some varieties or situations, but és aquí is completely standard and safe.

A simple English-style approximation is:

luh-MEEK ez uh-KEE

A few helpful points:

• amic is stressed on the last syllable: a-MIC
• és sounds like ace without the final c
• aquí is stressed on the last syllable: a-QUÍ

In connected speech, l' links directly to amic.

The accent shows that the stress falls on the last syllable:

• a-QUÍ

Without the accent, the spelling would suggest a different stress pattern. So the accent helps you pronounce it correctly.

Aquí is the most widely taught and widely understood form.

In some dialects, especially in Valencian, you may also see or hear ací. Both can mean here, but aquí is a very safe standard choice for learners.

Because amic is being used as a normal count noun meaning the friend. In Catalan, you usually need an article in this kind of sentence.

So:

• l'amic = the friend
• amic by itself would usually sound incomplete here

A bare noun can appear in special cases, such as:

• vocative: Amic, escolta'm
• headlines or very compressed style

But in an ordinary sentence like this, l'amic is what you want.

Yes, amic is masculine singular.

Related forms:

• masculine singular: l'amic
• feminine singular: l'amiga
• masculine plural: els amics
• feminine plural: les amigues

So you could also say:

• L'amiga és aquí
• Els amics són aquí
• Les amigues són aquí

Notice that the plural verb changes to són.

L'amic és aquí is the most neutral word order.

You can move aquí for emphasis, but the sentence may sound more marked or context-dependent. For example:

• Aquí és l'amic

This can work, but it sounds more like you are emphasizing here or presenting the friend in contrast with somewhere else. As a learner, the basic order L'amic és aquí is the best default.