Wir besuchen den Händler.

Because Händler is the direct object of besuchen, so it must be in the accusative case.

• der Händler = nominative singular masculine
• den Händler = accusative singular masculine

In this sentence:

• Wir = the subject
• besuchen = the verb
• den Händler = the person being visited, so the direct object

A very literal grammar breakdown is:

• Wir = we
• besuchen = visit
• den Händler = the dealer / merchant

Only the article changes here; Händler itself stays the same.

Wir is in the nominative case, because it is the subject of the sentence.

In German, the subject is the person or thing doing the action. Here, we are doing the visiting, so wir is nominative.

Yes, it is conjugated. It just happens to look exactly like the infinitive.

The infinitive is besuchen = to visit.

In the present tense:

• ich besuche
• du besuchst
• er/sie/es besucht
• wir besuchen
• ihr besucht
• sie/Sie besuchen

So wir besuchen is the correct present-tense form for we visit or we are visiting.

Because German main clauses usually follow the verb-second rule.

In a normal statement, the finite verb comes in position 2:

• Wir besuchen den Händler.

Here:

1. Wir
2. besuchen

That is standard German word order.

Even if another element comes first, the verb still stays second:

• Heute besuchen wir den Händler.
• Den Händler besuchen wir heute.

So the important rule is not subject first, but usually verb second.

No. Besuchen takes a direct object, so you do not use zu with it.

Correct:

• Wir besuchen den Händler.

Not:

• Wir besuchen zu dem Händler.

Compare:

• Wir besuchen den Händler. = We visit the dealer.
• Wir gehen zum Händler. = We go to the dealer.

So besuchen focuses on the visit itself, while gehen zu focuses on going there.

You usually learn the noun together with its article:

• der Händler

That tells you it is masculine.

There is not always a perfect rule for noun gender in German, but for a person noun like Händler referring to a male dealer/merchant, masculine makes sense.

Also, many occupation or person words ending in -er are masculine in their basic form, for example:

• der Lehrer
• der Fahrer
• der Händler

If you want to refer specifically to a female dealer, you would typically use:

• die Händlerin

It is singular here.

You can tell from the article:

• den Händler = accusative singular masculine
• die Händler = plural

So:

• Wir besuchen den Händler. = We visit the dealer.
• Wir besuchen die Händler. = We visit the dealers.

Because not all masculine nouns change in the accusative.

With Händler, only the article changes:

• nominative: der Händler
• accusative: den Händler

The noun itself stays the same.

Some masculine nouns do add -n or -en in the accusative, but those belong to a special group called weak nouns, for example:

• der Student → den Studenten
• der Junge → den Jungen

But Händler is not one of those nouns.

A rough pronunciation is:

HEND-ler

A bit more accurately:

• Hä sounds somewhat like e in bed
• ndl is pronounced together fairly quickly
• the final -er in standard German is often pronounced more like a soft uh sound than a strong English er

So it is approximately:

HEND-luh

The umlaut ä is important, because a and ä do not sound the same in German.

Yes. In German, the simple present tense often covers both meanings:

• We visit the dealer
• We are visiting the dealer

German does not always need a separate form like English am/is/are + -ing. The exact meaning depends on context.

So Wir besuchen den Händler can mean either a general present or something happening now.

Yes, that is grammatically correct.

• Wir besuchen den Händler. = neutral word order
• Den Händler besuchen wir. = puts extra emphasis on the dealer

German allows more word-order flexibility than English, but the conjugated verb still stays in second position in a main clause.

So both are correct, but they feel slightly different in emphasis.