Best Answer - Chosen by Voting
When it comes to very common words, it's easier to just look them up in a dictionary. It will probably help you more.
1: Exists, to exist, to be, become, is/am/are.
2: have, to have.
3: "på" has many meanings, in, about/around, to, of, as/like.
4: go/walk, walking.
Roughly...
How to use each and every one of these words will take too long to explain. I don't have the time to do that.
If you message me i can help you with them over time.