iregular
I didn´t do anything to learn this topic.
We didn´t go to the party yesterday.
they didn´t see the thief in the street.
She didn´t eat a lot of fruits.
You didn´t teach me the topic when I needed it.
Regular
I didn´t talk with her.
you didn´t help me when I needed you.
She didn´t achieved her goals.
They didn´t study for the exam.
He didn´t practice for exhibit.
