You learned about verbs in the first chapter.
When you have two verbs in one sentence, the
second verb will be used in a form called the
infinitive, which is the basic form of the verb, the
one you would find in a dictionary, without any
special ending.

If English is your first language, this might be
confusing. The word wait is just the same in I
wait and I have to wait, isn’t it? But replace I with
he, and you will see the difference:

he waits
he has to wait

This -s ending is actually the same as the Norwegian
-r ending ‒ except in Norwegian, we use
it for all the personal pronouns, not only for he/
she/it.