Wir gehen den ganzen Weg zusammen.

Because the subject is wir = we.

The verb gehen is conjugated like this in the present tense:

• ich gehe = I go
• du gehst = you go
• er/sie/es geht = he/she/it goes
• wir gehen = we go
• ihr geht = you all go
• sie/Sie gehen = they/you (formal) go

So Wir gehen means we go or we are going.

It can suggest either, depending on context, but in this sentence it often feels closer to walk because of den ganzen Weg = the whole way.

So the sentence can sound like:

• We walk the whole way together
• We go the whole way together

German gehen often means moving on foot, but English sometimes prefers go in a more general translation.

Because den ganzen Weg is in the accusative case.

Here, Weg is masculine:

• nominative: der Weg
• accusative: den Weg

In this sentence, den ganzen Weg functions as an expression of distance/extent: how far we go. German often uses the accusative for this kind of idea.

Compare:

• den ganzen Tag = the whole day
• die ganze Nacht = the whole night
• den ganzen Weg = the whole way

So it is not the subject of the sentence. The subject is wir.

Because German can use a bare accusative to express duration or distance/extent.

So instead of needing a preposition like for or along, German can simply say:

• den ganzen Tag arbeiten = work all day
• die ganze Nacht schlafen = sleep all night
• den ganzen Weg gehen = go/walk the whole way

This is very normal German.

Because ganzen must match the noun phrase den Weg.

In den ganzen Weg:

• den = masculine accusative singular definite article
• after a definite article, the adjective usually takes the weak ending
• masculine accusative singular weak ending = -en

So:

• der ganze Weg = nominative
• den ganzen Weg = accusative

That is why it is ganzen.

Zusammen means together.

It is an adverb, and it tells us how the action happens: we go together.

So:

• Wir gehen ... zusammen. = We go ... together.

It does not describe Weg. It describes the action of gehen.

That is a very natural word order in German.

German often puts:

• the conjugated verb in position 2
• other information in the middle
• adverbs like zusammen later in the sentence

So Wir gehen den ganzen Weg zusammen sounds very normal.

You could also hear:

• Wir gehen zusammen den ganzen Weg.

That also works, but it gives a slightly different emphasis. The original version sounds very smooth and idiomatic.

Yes.

It can be literal:

• two or more people physically go/walk the whole route together

It can also be figurative:

• We’re in this together all the way
• We’ll go through the whole journey together

German often allows both readings, and context tells you which one is meant.

Not exactly.

• Weg = way, route, path, stretch of the journey
• Straße = street, road
• Pfad = path, trail, often narrower or more natural

In den ganzen Weg, Weg is best understood as the whole way or the whole route, not necessarily a literal street.

Grammatically, it is the present tense, but German present tense can cover several ideas that English expresses differently.

Depending on context, Wir gehen can mean:

• We go
• We are going
• We’re going to go / We will go

So the exact English tense depends on the situation, not just the German form.

Because Weg is a noun, and all nouns are capitalized in German.

So:

• wir = not capitalized here, because it is a pronoun in the middle of a sentence
• gehen = verb, not capitalized
• den ganzen Weg = Weg is a noun, so it is capitalized
• zusammen = adverb, not capitalized

Yes. Gemeinsam can also mean together.

But there is a slight nuance:

• zusammen is very common and everyday
• gemeinsam can sound a little more formal or more focused on shared action

So:

• Wir gehen den ganzen Weg zusammen = very natural, everyday
• Wir gehen den ganzen Weg gemeinsam = also correct, slightly different tone

In many contexts, both are possible.