Das Reparaturmaterial liegt auf der Werkbank.

Because Reparaturmaterial is a neuter noun, so its basic article is das.

In this sentence, das Reparaturmaterial is also the subject, so it is in the nominative case. For a neuter noun in the nominative, the article is das.

A useful rule with German compound nouns is that the last part usually determines the gender. Here, the last part is Material, and das Material is neuter, so the whole word is das Reparaturmaterial.

Yes. German very often combines nouns into a single compound word.

So:

• Reparatur = repair
• Material = material

Together, they form Reparaturmaterial = repair material / materials used for repair.

This is completely normal in German. English often uses separate words where German prefers one compound noun.

German often uses a more specific verb for location than English does.

Here, liegen means to lie or to be lying, and it is commonly used for things that are resting somewhere, especially objects that are horizontal or simply located somewhere.

So Das Reparaturmaterial liegt auf der Werkbank sounds natural in German.

You could sometimes say ist in similar contexts, but liegt is more idiomatic when talking about where an object is physically lying.

The base form is liegen.

In this sentence, liegt is:

• 3rd person singular
• present tense

because the subject is das Reparaturmaterial, which is grammatically singular.

So the conjugation is:

• ich liege
• du liegst
• er/sie/es liegt

Because auf is a two-way preposition in German. That means it can take either:

• accusative for direction/movement toward a place
• dative for location in a place

Here, the sentence describes where the material is. There is no movement. So German uses the dative:

• auf der Werkbank = on the workbench

If you were talking about movement onto the workbench, you would use the accusative:

• Ich lege das Reparaturmaterial auf die Werkbank. = I put the repair material onto the workbench.

So:

• location → auf der Werkbank
• movement/destination → auf die Werkbank

Because Werkbank is a feminine noun:

• nominative: die Werkbank

But after auf in a location meaning, the noun goes into the dative case. The feminine dative article is der:

• nominative: die Werkbank
• dative: der Werkbank

So:

• auf der Werkbank = on the workbench

This is a very common pattern with feminine nouns.

This is a very common learner question.

• liegen = to lie, to be lying, to be located somewhere
• legen = to lay, to put something somewhere

So:

• Das Reparaturmaterial liegt auf der Werkbank. = The repair material is lying on the workbench.

• Ich lege das Reparaturmaterial auf die Werkbank. = I put the repair material on the workbench.

A useful shortcut:

• liegen = no direct object, describes a state/location
• legen = usually takes a direct object, describes placing something somewhere

Because German main clauses normally follow the verb-second rule, often called V2.

In this sentence:

• Das Reparaturmaterial = first element
• liegt = second element
• auf der Werkbank = the rest

So the structure is:

Subject + verb + location

That is the normal word order for a simple statement in German.

You can move other parts to the front, but the verb still stays second:

• Auf der Werkbank liegt das Reparaturmaterial.

That version is also correct, but it gives more emphasis to the location.

Grammatically, it is singular, because it takes:

• das
• liegt instead of liegen

But in meaning, it can refer to material in a collective sense, similar to English repair material or repair supplies.

So even though it is singular in grammar, it may refer to more than one physical item.

Yes, that would be understandable and grammatically possible.

However, liegt sounds more natural if you are talking about an object physically resting on the workbench. German often prefers this more specific kind of verb.

So:

• ist auf der Werkbank = possible, more general
• liegt auf der Werkbank = more natural and more precise for physical placement

Because all nouns are capitalized in German.

That is why you see:

• das Reparaturmaterial
• die Werkbank

This is one of the most noticeable spelling differences between German and English, and it helps learners spot nouns more easily.