Questions & Answers about Er du sikker på, at bussen kommer til tiden?
Because this is a yes/no question.
In Danish, a normal statement would be:
Du er sikker på, at bussen kommer til tiden.
= You are sure that the bus is coming on time.
To turn that into a yes/no question, Danish usually puts the finite verb first:
- Du er ... → statement
- Er du ...? → question
This is similar to English Are you ...?
Sikker på means sure about or certain about.
It is a fixed combination:
- at være sikker på noget = to be sure about something
- at være sikker på, at ... = to be sure that ...
So in this sentence:
Er du sikker på, at bussen kommer til tiden?
the på belongs with sikker. It is not random; it is the normal preposition used in this expression.
Examples:
- Jeg er sikker på svaret. = I’m sure about the answer.
- Jeg er sikker på, at han kommer. = I’m sure that he is coming.