Ik zet het alarm om zes uur aan.

I set the alarm for six o’clock.

Breakdown of Ik zet het alarm om zes uur aan.

• ik: I
• om: for
• aanzetten: to turn on
• het uur: the hour
• zes: six
• het alarm: the alarm

Questions & Answers about Ik zet het alarm om zes uur aan.

Why is the verb split into zet and aan?

In Dutch there are many separable verbs – verbs made of a stem plus a prefix. aanzetten (‘to turn on’) is one of them. In a simple main clause the prefix (aan) detaches and moves to the end, while the stem (zet) remains next to the finite verb position.

What does om zes uur mean, and why use om instead of op or another preposition?

om zes uur literally means “at six o’clock.” When specifying a precise clock time in Dutch, you always use om + hour. You cannot say op zes uur for exact times (though you can use op with days or dates, e.g. op maandag, op 1 mei).

Why is the article het used with alarm instead of de?

alarm is a neuter noun in Dutch, so it takes the definite article het (like het huis, het probleem). There isn’t a strict rule for all words – gender often must be memorized – but alarm always goes with het.

Can I move om zes uur to the front of the sentence?

Yes. If you start with a time phrase, you trigger subject–verb inversion. So you get:
• Om zes uur zet ik het alarm aan.
The finite verb (zet) stays in second position, even though the time adverbial comes first.

How would I turn this into a yes/no question?

You invert the subject and the finite verb. For “you” (informal):
• Zet je het alarm om zes uur aan?
If you want to ask “when” instead of yes/no, use Wanneer:
• Wanneer zet je het alarm aan?

How do I express the same idea in the past tense?

Use the perfect tense with hebben + past participle aangezet:
• Ik heb het alarm om zes uur aangezet.

What’s the difference between aanzetten and inschakelen?

Both verbs can mean “to switch on,” but:

• aanzetten is more general and common in everyday speech (for lights, devices, alarms).
• inschakelen is slightly more formal or technical (often used in manuals or formal contexts).

Why might I see wekker instead of alarm?

wekker specifically means a physical alarm clock, whereas alarm can refer to any alarm function (phone alarm, security alarm). If you’re talking about your clock radio you’d say:
• Ik zet de wekker om zes uur.