Auf der Kommode im Flur liegt mein Schlüsselbund.

German is flexible about what comes first in a main clause. The first position is often used for the information the speaker wants to highlight.

Here, Auf der Kommode im Flur is placed first to emphasize the location. In English, we usually keep the subject first, but in German this is very normal.

Even when something other than the subject comes first, the finite verb still has to stay in second position in a main clause. So the structure is:

• Auf der Kommode im Flur = position 1
• liegt = position 2
• mein Schlüsselbund = subject after the verb

So this is a standard German word order pattern, not an unusual one.

Because German main clauses follow the verb-second rule.

That means the conjugated verb must come in the second position, no matter what element is first. Since Auf der Kommode im Flur takes the first position, liegt must come next.

So:

• Auf der Kommode im Flur → first slot
• liegt → second slot
• mein Schlüsselbund → comes after the verb

In English, this would sound more marked, but in German it is completely natural.

Because this sentence describes location, not movement.

With prepositions like auf, German uses:

• dative for a fixed location: where something is
• accusative for direction or movement: where something is going

Here, the keyring is already resting on the chest of drawers, so German uses the dative:

• auf der Kommode = on the chest of drawers

If you were talking about putting it there, you would use the accusative:

• Ich lege den Schlüsselbund auf die Kommode. = I put the keyring onto the chest of drawers.

Because Kommode is a feminine noun, and it is in the dative case here.

The definite article changes like this for feminine nouns:

• nominative: die Kommode
• accusative: die Kommode
• dative: der Kommode

So der here does not mean the noun is masculine. It is simply the dative form of the feminine article.

im is a contraction of in dem.

So:

• im Flur = in dem Flur

This is very common in German. Some frequent contractions are:

• im = in dem
• am = an dem
• zum = zu dem
• zur = zu der

In this sentence, im Flur means in the hallway.

For the same reason as Kommode: it describes a location, not motion.

The preposition in can take either:

• dative for location: in dem Flur / im Flur
• accusative for movement into something: in den Flur

So:

• im Flur = in the hallway, already there
• in den Flur = into the hallway, moving there

Since the sentence tells us where the chest of drawers is, or where the keyring is in relation to the hallway setting, the dative is used.

Because Schlüsselbund is the subject of the sentence, so it is in the nominative case.

For a masculine noun with mein, the forms are:

• nominative: mein Schlüsselbund
• accusative: meinen Schlüsselbund
• dative: meinem Schlüsselbund

Since mein Schlüsselbund is the thing doing the verb liegt, it must be nominative.

Schlüsselbund is masculine: der Schlüsselbund.

That is why, in the nominative, you get:

• mein Schlüsselbund

If it were feminine, it would be meine If it were plural, it would also be meine

So learning the noun together with its article is important:

• der Schlüsselbund = keyring / bunch of keys

Yes, absolutely.

That version is also correct and probably feels closer to normal English word order:

• Mein Schlüsselbund liegt auf der Kommode im Flur.

The difference is mainly focus:

• Auf der Kommode im Flur liegt mein Schlüsselbund.
  Emphasizes the location.
• Mein Schlüsselbund liegt auf der Kommode im Flur.
  Emphasizes the keyring itself, or is simply more neutral.

Both are natural German.

liegen means to lie or to be lying, and in German it is often used for things that are resting in a horizontal position or simply located somewhere.

German often prefers a more specific position verb where English might just say is.

So:

• Der Schlüsselbund liegt auf der Kommode. = The keyring is lying / is on the chest of drawers.
• Das Buch liegt auf dem Tisch. = The book is on the table.

Using ist is sometimes possible in other contexts, but liegt sounds more natural here because it describes how the object is resting.

Because im Flur directly narrows down der Kommode.

The phrase means:

• on the chest of drawers
• and that chest of drawers is in the hallway

So im Flur describes Kommode, not separately the keyring by itself.

You can think of it like this:

• [Auf der Kommode [im Flur]] liegt mein Schlüsselbund.

In natural English, that is something like On the chest of drawers in the hallway lies my keyring.

It is singular.

You can tell because the verb is singular:

• liegt = singular
• liegen = plural

So:

• mein Schlüsselbund liegt = my keyring lies / is lying
• meine Schlüsselbunde liegen would be plural, though in real usage you are more likely to hear a phrase like meine Schlüssel depending on the meaning

Even though a Schlüsselbund contains several keys, the word itself refers to one bundle or one keyring, so grammatically it is singular.