De composthoop ligt achter de broeikas.

Dutch often uses a position verb where English would simply use to be.

Here, liggen means to lie or more generally to be located lying/on the ground. A compost heap is something you imagine as resting on the ground, so ligt sounds natural.

• De composthoop ligt achter de broeikas. = The compost heap is behind the greenhouse.

You may sometimes hear is in similar sentences, but ligt is more idiomatic here.

Common Dutch position verbs are:

• liggen = lie
• staan = stand
• zitten = sit / be in
• hangen = hang

So Dutch is often more specific than English about how something is located.

Ligt is the third-person singular present tense of liggen.

The subject is de composthoop, which is singular, so you use ligt:

• ik lig = I lie
• jij ligt = you lie
• hij/zij/het ligt = he/she/it lies
• de composthoop ligt = the compost heap lies/is located

Dutch very often forms compound nouns by writing them as a single word.

So:

• compost
  • hoop = composthoop

This is completely normal in Dutch. English often writes similar ideas as two words, but Dutch usually combines them.

Other examples:

• tuin
  • deur = tuindeur
• school
  • plein = schoolplein

So composthoop is not unusual at all—it is exactly how Dutch normally builds nouns.

In this compound, hoop means heap or pile.

So composthoop literally means compost heap.

Be aware that hoop can also mean hope in other contexts, but here it clearly means heap because it is part of the compound composthoop.

Both composthoop and broeikas are de-words, so their definite article is de.

In Dutch, singular nouns usually take either:

• de
• het

Unfortunately, there is no single rule that lets you predict all nouns perfectly, so you often have to learn them with the noun.

In this sentence:

• de composthoop
• de broeikas

A useful habit is to memorize nouns together with their article:

• de composthoop
• de broeikas

not just composthoop and broeikas by themselves.

Achter is a preposition meaning behind.

So:

• achter de broeikas = behind the greenhouse

This works much like English:

• behind the greenhouse

Dutch prepositions usually come before the noun phrase, just like in English:

• achter het huis = behind the house
• naast de schuur = next to the shed
• voor de deur = in front of the door

This is normal Dutch main clause word order:

1. Subject: De composthoop
2. Finite verb: ligt
3. The rest of the sentence: achter de broeikas

So the structure is:

• Subject + verb + place

That is very similar to English here:

• The compost heap is behind the greenhouse

Dutch main clauses usually put the finite verb in the second position. In this sentence, the subject comes first, so the verb comes right after it.

Yes. That is also correct.

Dutch allows you to move the location phrase to the front for emphasis:

• Achter de broeikas ligt de composthoop.

This means the same thing, but it puts more focus on achter de broeikas.

Notice that when the location comes first, the verb still stays in the second position:

• Achter de broeikas
  • ligt
    • de composthoop

This is a very important Dutch word-order pattern.

Both can refer to a greenhouse.

• kas is very common in everyday Dutch.
• broeikas is also correct, but can sound a bit more specific or formal depending on context.

So this sentence could often also be phrased as:

• De composthoop ligt achter de kas.

Both are understandable, but kas is probably the more everyday word in many situations.

The plurals are:

• de composthoop → de composthopen
• de broeikas → de broeikassen

Examples:

• De composthopen liggen achter de broeikassen.

Notice:

• hoop becomes hopen
• kas becomes kassen with a doubled s

Also, plural nouns always take de in Dutch.

A rough pronunciation guide:

• broeikas ≈ BROO-eye-kahs
• composthoop ≈ kom-POST-hope

A few useful points:

• oe in Dutch sounds like oo in food
• ei sounds a bit like eye
• oo sounds like a long o
• final p in composthoop is clearly pronounced

So:

• broei sounds roughly like broo-eye
• hoop sounds like hope, but with a purer long o

It can simply describe where something is located; it does not have to imply anything especially permanent.

Because Dutch uses liggen for location, the sentence naturally sounds like a normal statement of place:

• The compost heap is behind the greenhouse.

It could describe:

• a usual location
• the current location
• a general fact about a garden or property

The verb liggen does not by itself force a strong distinction between permanent and temporary in this kind of sentence.

Yes, in some contexts broeikas can also be used in broader or figurative ways, but in this sentence the literal meaning is the obvious one: a structure for growing plants.

You may also see related words like:

• broeikaseffect = greenhouse effect
• broeikasgas = greenhouse gas

But on its own, in a garden sentence like this, broeikas clearly means greenhouse.