Er geht voraus.

Here voraus means ahead or in front.

So Er geht voraus means that he goes ahead, usually in the sense that he moves in front of other people and they follow, or he takes the lead.

It is not just a random adverb here: with gehen, it forms the verb vorausgehen.

Because vorausgehen is a separable verb.

In a normal main clause, the conjugated verb part goes to position 2, and the separable prefix moves to the end:

• Er geht voraus.

But in the infinitive, it stays together:

• vorausgehen

And in a subordinate clause, it also stays together:

• ..., weil er vorausgeht.

This is very common in German:

• anrufen → Ich rufe dich an.
• aufstehen → Er steht früh auf.
• vorausgehen → Er geht voraus.

Yes, in the dictionary form, yes: vorausgehen.

But when it is used as a conjugated separable verb in a main clause, it gets split:

• infinitive: vorausgehen
• main clause: Er geht voraus
• subordinate clause: ..., dass er vorausgeht

So learners often see both vorausgehen and geht voraus, and both are correct—they are just different grammatical forms of the same verb.

Usually, no—not if you mean he goes ahead in this sense.

voraus is the natural word here.
vor by itself usually does not mean the same thing and would sound incomplete or different.

So use:

• Er geht voraus. = He goes ahead.

Not:

• Er geht vor. ❌

It is present tense.

• er geht = he goes / he is going

Like English, German present tense can sometimes describe what is happening now, a general habit, or even a near-future action depending on context.

So Er geht voraus could mean:

• He is going ahead
• He goes ahead
• sometimes even He’ll go ahead first, depending on the situation

It can be both.

Literal:

• Er geht voraus.
  He walks ahead / goes in front.

Figurative:

vorausgehen can also mean that something comes before something else, or precedes it.

For example:

• Dem Essen ging ein langer Vortrag voraus.
  A long speech preceded the meal.

But in your sentence, with er and geht, the most natural reading is the literal one: he goes ahead.

The perfect tense is:

• Er ist vorausgegangen.

This verb uses sein, not haben, because it involves movement/change of position, which is common with verbs like gehen.

So:

• present: Er geht voraus.
• perfect: Er ist vorausgegangen.

In a subordinate clause, the separable verb is no longer split. It becomes one word again:

• ..., weil er vorausgeht.
• ..., dass er vorausgeht.

This is a very important pattern in German.

Compare:

• main clause: Er geht voraus.
• subordinate clause: Ich sehe, dass er vorausgeht.

Not quite.

• vorne means at the front
• voraus means ahead, often with the idea of moving before others or leading

Compare:

• Er sitzt vorne. = He is sitting at the front.
• Er geht voraus. = He goes ahead.

So vorne is more about position, while voraus often suggests movement and being ahead of others.

They are similar, and both can mean to go ahead or to lead the way.

But vorangehen can sound a bit more formal or abstract in some contexts, especially when talking about setting an example or progressing first.

For everyday physical movement, vorausgehen is very natural:

• Ich gehe voraus. = I’ll go ahead.

You may see both, but vorausgehen is a very good and common choice here.

It is pronounced roughly like foh-ROWSS.

The stress is on the second syllable:

• vo-RAUS

That stressed second part is important, especially because in the sentence the separable part stands alone at the end:

• Er geht vo-RAUS.

Yes, absolutely.

You can change the subject and use it very naturally in speech:

• Ich gehe voraus. = I’ll go ahead.
• Geh voraus! = Go ahead!
• Geht schon mal voraus. = Go on ahead already / You all go ahead first.

This is a very common everyday use of the verb.

Because gehen does not need a direct object here.

The sentence is complete with just:

• subject: Er
• verb: geht
• separable prefix/adverbial part: voraus

So Er geht voraus is a complete sentence meaning He goes ahead.

There is no missing object like him, it, or the way.