Er is stof in mijn oog.

Here er is not talking about a place. It is an existential er, used in sentences like Er is ... / Er zijn ..., which correspond to English There is ... / There are ....

So:

• Er is stof in mijn oog. = There is dust in my eye.

In this kind of sentence, er is basically a grammatical placeholder.

Because stof is treated as singular in Dutch.

Even though dust consists of many tiny particles, stof is normally an uncountable mass noun, just like English dust. Mass nouns usually take singular agreement:

• Er is stof ...
• not Er zijn stof ...

If you had a plural countable noun, you would use zijn:

• Er zijn stenen in de tuin. = There are stones in the garden.

Because stof here means dust as an uncountable substance, not one separate object.

With mass nouns, Dutch often uses no article when you mean some in a general sense:

• Er is water op tafel.
• Er is zand in mijn schoen.
• Er is stof in mijn oog.

You would use:

• het stof if you mean the dust in a specific sense
• een stofje if you mean a speck of dust

So Er is stof in mijn oog sounds like There is dust in my eye, not There is a dust in my eye.

No. Stof can mean several things depending on context, including:

• dust
• fabric/cloth
• material/substance

But in Er is stof in mijn oog, the context makes dust the only natural meaning.

For example:

• Deze stof is zacht. = This fabric is soft.
• Giftige stoffen = toxic substances

So Dutch learners need to rely on context with stof.

Because the sentence is talking about one eye.

• mijn oog = my eye
• mijn ogen = my eyes

If both eyes were involved, you would say:

• Er zit stof in mijn ogen.

In the original sentence, the speaker means that dust is in one eye.

It is grammatical and understandable, but many Dutch speakers would more naturally say:

• Er zit stof in mijn oog.
• Ik heb stof in mijn oog.

Why zit? Dutch often uses zitten for something that is physically located somewhere, especially if it is stuck, lodged, or sitting in a place.

So:

• Er is stof in mijn oog. = correct
• Er zit stof in mijn oog. = often more idiomatic in everyday speech

A very common version is:

• Er zit iets in mijn oog. = There is something in my eye.

This is the normal Dutch pattern for an existential sentence:

• Er
  • verb
    • noun phrase
      • place

So:

• Er = existential placeholder
• is = verb
• stof = the thing that exists
• in mijn oog = where it is

This is similar to English There is dust in my eye.

If you move another part to the front for emphasis, Dutch still keeps the verb in second position:

• In mijn oog zit stof.

That version puts more focus on in my eye.

Yes. That is very natural Dutch.

Compare:

• Er is stof in mijn oog. = There is dust in my eye.
• Ik heb stof in mijn oog. = I have dust in my eye.

The second version is often very common in everyday speech, especially when you are describing your own problem or discomfort.

So if you are actually telling someone about it, Ik heb stof in mijn oog may sound especially natural.

Oog is pronounced roughly like ohkh.

Two useful points:

• oo is a long o sound, similar to the vowel in English go, but purer.
• g in standard Dutch is the guttural sound heard in Scottish loch or German Bach.

So oog is approximately /oːx/.

If the guttural g is hard for you, that is normal for English speakers. It takes practice.