Examples of using "Opgevallen" in a sentence and their english translations:
He noticed.
- I never noticed that before.
- I've never noticed that before.
He didn't notice the difference.
- He didn't notice.
- He hasn't noticed.
Everyone noticed that.
She kept looking at you. Didn't you notice?
He hasn't noticed.
Didn't you notice us going out of the room?
Seriously? I haven't noticed.
I've noticed that Tom doesn't usually lock his door.