Bitte räume die Tassen weg, bevor wir nach Hause gehen.

Not exactly. The verb here is wegräumen, which means put away, clear away, or tidy away.

So Bitte räume die Tassen weg means something like:

• Please put the cups away
• Please clear the cups away

It usually suggests moving them from where they are now and putting them in their proper place. It does not specifically mean wash the cups. For that, German would use verbs like abwaschen or spülen.

Because wegräumen is a separable verb.

Its full dictionary form is wegräumen, but in a normal main clause or in a command, the verb splits:

• Ich räume die Tassen weg.
• Räume die Tassen weg.

So:

• räume = the main verb part
• weg = the separated prefix, placed at the end

This is very common in German. Compare:

• anmachen → Ich mache das Licht an.
• aufstehen → Wir stehen früh auf.

Yes. Räume is the informal singular imperative form of räumen, so it is used when telling one person to do something.

With räumen, the command can be:

• Räum die Tassen weg!
• Räume die Tassen weg!

Both are possible. The version with -e can sound a bit fuller or slightly more careful, but both are normal.

So in this sentence, räume means put away!

German usually leaves out the subject pronoun in the imperative.

So instead of saying:

• Du räum die Tassen weg

German normally says:

• Räum die Tassen weg
• Räume die Tassen weg

The du is understood.

You can add du for emphasis, but then it sounds marked, for example if you want to stress who should do it:

• Räum du bitte die Tassen weg.

Here bitte means please.

It softens the command and makes it more polite:

• Räume die Tassen weg. = more direct
• Bitte räume die Tassen weg. = Please put the cups away.

Its position is fairly flexible. You can also hear:

• Räume bitte die Tassen weg.
• Räum die Tassen bitte weg.

All of these are natural.

Because bevor wir nach Hause gehen is a subordinate clause, and German normally separates subordinate clauses from the main clause with a comma.

So the sentence is divided like this:

• Bitte räume die Tassen weg,
• bevor wir nach Hause gehen.

This is standard German punctuation. You also get commas before other subordinate-clause conjunctions such as weil, dass, wenn, and obwohl.

Because bevor introduces a subordinate clause, and in German subordinate clauses the conjugated verb goes to the end.

So:

• wir gehen nach Hause = main clause
• bevor wir nach Hause gehen = subordinate clause

That verb-final order is a very important German pattern.

You can compare:

• weil wir müde sind
• dass er heute kommt
• wenn sie Zeit haben

In all of these, the verb comes at the end of the subordinate clause.

This is a very common point:

• nach Hause = to home / homeward → movement
• zu Hause = at home → location

So here, because the sentence talks about going home, German uses nach Hause:

• Wir gehen nach Hause. = We are going home.

But:

• Wir sind zu Hause. = We are at home.

Because die Tassen is the accusative plural form, and in this case it looks the same as the nominative plural.

The verb wegräumen takes a direct object, so die Tassen is in the accusative case. But for plural definite nouns, the article is still die:

• nominative plural: die Tassen
• accusative plural: die Tassen

So the form does not change here.

If it were a masculine singular noun, you would see the case change more clearly:

• der Becher → nominative
• den Becher → accusative