Instead of opting for bland, unspecific expressions ("says," "writes about," "believes," "states") consider using more vivid or nuanced verbs such as "argues," "insists," "explains," "emphasizes," ...

The irregular imperfect verb stems can be found in a dictionary or on an irregular verb list. For example, if you check the verb trinken (to drink), you will find that it is an irregular verb and ...

A verb is a word used to describe an action. That’s doing something. Or, a verb can be used to describe a state. That’s feeling something. Or, a verb can be used to describe an occurrence.