Der Zug fährt gleich ab.

Because der Zug is the subject of the sentence — it is the thing doing the action.

In German, the article changes depending on the noun’s role in the sentence:

• der Zug = nominative, used for the subject
• den Zug = accusative, usually for a direct object
• dem Zug = dative, often for an indirect object or after certain prepositions

Here, the train is the one that departs, so nominative is needed: der Zug.

Fährt is the 3rd person singular present-tense form of fahren.

The verb fahren means to drive / to go / to travel, and in transport contexts it is also used for things like trains, buses, and cars moving.

Its present-tense forms are:

• ich fahre
• du fährst
• er/sie/es fährt
• wir fahren
• ihr fahrt
• sie/Sie fahren

Since der Zug is grammatically he/it in German, the correct form is fährt.

This is a normal stem change in the present tense.

For fahren, the vowel changes from a to ä in the du and er/sie/es forms:

• du fährst
• er/sie/es fährt

Not every German verb does this, but some common strong verbs do. So this is something you usually just learn as part of the verb pattern.

Because the full verb is abfahren, which is a separable verb.

• dictionary form: abfahren
• in a normal main clause: the prefix separates
• so fährt goes to the usual verb position, and ab moves to the end

That is why you get:

• Der Zug fährt ab.

This is very common in German with separable verbs:

• ankommen → Der Zug kommt an.
• einsteigen → Wir steigen ein.
• aufstehen → Ich stehe auf.

Here, abfahren means to depart or to leave, especially for scheduled transport such as:

• trains
• buses
• ships

So Der Zug fährt gleich ab means the train is about to leave.

A useful contrast:

• abfahren = depart
• ankommen = arrive

In this sentence, gleich means soon, in a moment, or right away.

It does not mean equal here, even though gleich can also mean same / equal in other contexts.

So in this sentence:

• Der Zug fährt gleich ab = The train is leaving very soon.

This is a very common everyday use of gleich.

Not exactly.

Both can refer to the near future, but gleich usually feels more immediate than bald.

• gleich = very soon, in a moment
• bald = soon, but often a little less immediate

So:

• Der Zug fährt gleich ab suggests the departure is imminent.
• Der Zug fährt bald ab also means it will leave soon, but sounds slightly less urgent.

In many situations both are possible, but gleich is especially natural when something is about to happen.

German often uses the present tense for the future when the context already makes the timing clear.

Here, gleich makes it clear that the action will happen very soon, so German does not need a special future form.

That is why Der Zug fährt gleich ab is completely normal.

German does this a lot:

• Ich komme morgen. = I’m coming tomorrow.
• Der Film beginnt gleich. = The movie starts in a moment.

Using werden is possible in some future contexts, but it is usually unnecessary here.

Yes. German main clauses follow the verb-second rule, which means the finite verb must stay in the second position, but the first element can change.

So you can also say:

• Gleich fährt der Zug ab.

This puts more emphasis on gleich.

Both are correct:

• Der Zug fährt gleich ab.
• Gleich fährt der Zug ab.

The meaning is basically the same, but the emphasis changes slightly.

A rough pronunciation guide:

• fährt sounds roughly like fehrt, but with a long vowel somewhat like the vowel in air for many English speakers
• gleich sounds roughly like glykh or glaikh, with the ch made in the back of the mouth after ei

A few details:

• ä in fährt is not exactly the English a in cat
• ei in gleich sounds like the English eye
• the ch in gleich is the German ich/ach-type sound; here it is the back version because it follows ai

If you want a simple learner-friendly approximation:

• Der Zug fährt gleich ab ≈ dare tsoog fehrt glykh ap

Not perfect, but close enough to get started.

No, not in standard German for a train departure.

For trains and similar transport, German normally uses abfahren:

• Der Zug fährt gleich ab.

Using gehen here would sound wrong or very unnatural.

This is one of those places where German uses a different verb from English. English says the train leaves, but German prefers the train departs / drives off with abfahren.

Gleich is an adverb.

It adds information about when the action happens, so it functions as an adverb of time.

Sentence structure:

• Der Zug = subject
• fährt = finite verb
• gleich = adverb of time
• ab = separable prefix belonging to abfahren

So even though ab is separated from fährt, together they still form the full verb idea: abfährt / abfahren.