How is this singular instead of plural. Slaapt vs slapen?
It is exactly the same as in English:
Everyone (singular) sleeps.
Iedereen (singular) slaapt.
What's wrong with "alemaal slaapt"?
hey it's been a year, have you learnt why alemaal slaapt was wrong?
Can somebody explain why "Alle slapen" is wrong? :) Thank you!
Because "alle" means "every", not "everyone".
everyone sleeps = iedereen slaapt.
everyone is sleeping = iedereen slapen?
No, almost. I suggest this page: https://forum.duolingo.com/comment/25006809