De docent vraagt waarom zij zo hard staan te schreeuwen, terwijl het lampje op de camera blijft knipperen.

Because the verb is staan, which is plural.

• zij staat = she is standing
• zij staan = they are standing

So even though zij can mean either she or they, the verb form tells you it must be plural here.

This is a very common Dutch construction:

• staan te + infinitive
• literally: to stand doing something
• natural meaning: to be standing there doing something, often with a sense of an ongoing or noticeable action

So:

• zij schreeuwen = they shout / they are shouting
• zij staan te schreeuwen = they are standing there shouting / they are busy shouting

In many contexts, this adds a slightly more vivid or sometimes slightly annoyed tone. It does not always strongly emphasize that they are physically standing, but it often suggests a visible ongoing action.

Because waarom introduces a subordinate clause.

In Dutch subordinate clauses, the finite verb usually moves toward the end. That is why you get:

• De docent vraagt waarom zij zo hard staan te schreeuwen.

Compare that with a direct question:

• Waarom staan zij zo hard te schreeuwen?

So:

• direct question: Waarom staan zij ... ?
• embedded question after vraagt: waarom zij ... staan te schreeuwen

That difference in word order is very important in Dutch.

Here zo hard means so loudly or so hard in the sense of intensity.

With sounds and speaking verbs, hard often means loud:

• hard praten = talk loudly
• hard lachen = laugh loudly
• hard schreeuwen = shout loudly

So zo hard staan te schreeuwen means to be shouting so loudly.

It does not mean hard in the English sense of physically solid.

Because Dutch uses te + infinitive in this construction:

• staan te schreeuwen
• zitten te lezen
• lopen te zeuren
• liggen te slapen

So after these posture/movement verbs in this pattern, Dutch normally uses te before the main infinitive.

Terwijl usually means while, but it can also carry a contrastive sense like whereas.

In this sentence, both ideas are present:

• the teacher is asking why they are shouting so loudly
• at the same time, the camera light keeps blinking

So terwijl can be understood as while here, with a slight sense of contrast or background situation.

This is another common Dutch verb pattern:

• blijven + infinitive = keep/continue doing something

So:

• het lampje knippert = the light blinks / is blinking
• het lampje blijft knipperen = the light keeps blinking / continues blinking

It emphasizes that the blinking is ongoing.

Lampje is the diminutive form of lamp.

• de lamp = the lamp/light
• het lampje = the little light / small indicator light

Diminutives are extremely common in Dutch. They often suggest something small, cute, minor, or simply a specific small object. Here lampje is very natural because a camera usually has a small indicator light.

Also notice that diminutives are always het words:

• de lamp
• het lampje

Because op de camera means on the camera: the light is physically located on it.

• het lampje op de camera = the little light on the camera

If you said van de camera, that would mean of the camera or belonging to the camera, which is possible in some contexts, but op de camera is more precise here because it refers to position.

No. Docent is not necessarily male.

• de docent can mean the teacher/lecturer
• it can refer to a man or a woman, depending on context

Dutch often uses common-gender nouns without marking biological sex. So the sentence itself does not tell you whether the teacher is male or female.

Because terwijl introduces another clause, and Dutch normally separates such clauses with a comma in sentences like this.

So the comma helps divide:

1. the main statement:
   • De docent vraagt waarom zij zo hard staan te schreeuwen
2. the terwijl clause:
   • terwijl het lampje op de camera blijft knipperen

This is standard punctuation.

Yes, it is completely normal.

• vragen waarom ... = to ask why ...

So:

• De docent vraagt waarom zij zo hard staan te schreeuwen = The teacher asks why they are shouting so loudly

Dutch can also use other expressions in related meanings, such as:

• zich afvragen waarom ... = to wonder why ...

But vraagt waarom is straightforward and natural when someone is actually asking the question.

Often, yes — or at least it can.

The construction staan te + infinitive sometimes gives a feeling like:

• there they are, doing that
• an ongoing action that the speaker notices
• sometimes something irritating, silly, or excessive

So zo hard staan te schreeuwen can sound a bit more expressive than just zo hard schreeuwen. In this sentence, that fits well because the teacher is asking why they are being so loud.