Learn German: Ich habe den Weg gekannt.

gekannt comes from the verb kennen (to know). It belongs to a special group called "mixed" verbs. This means it acts like a regular verb by adding the prefix ge- and the ending -t, but it also acts like an irregular verb by changing its middle vowel—in this case, from e to a.

Why do we use a form of kennen here instead of wissen?

Both verbs mean "to know," but they are used differently. You use kennen when you are familiar with a person, place, or thing (like knowing a city or a path). You use wissen when you know a fact or a piece of information. Since you are familiar with a physical route here, you must use kennen.

Why does the sentence use den Weg instead of der Weg?

Weg (way or path) is a masculine noun, so its basic dictionary word for "the" is der. However, because it is the direct object in this sentence—the thing receiving the action of being known—it must take the accusative case. For masculine nouns, the accusative case changes der to den.

Why is gekannt placed at the very end of the sentence?