Past Perfect
NL: voltooid verleden tijd
Had verb +ed / 3rd irr verb
Ms. D had forgotten her laptop before she came to school.
They had left before he came back.
Steve hadn't registered before coming to the flexhour.
Past Simple
NL: verleden tijd
verb +ed / 2nd irr verb
Ms. D went to the cinema.
The students didn't go to class on the studiedag.
Youssef walked home alone.