2 Irregular verbs What irregular verbs to do you know? What makes them irregular?
3 Some definitions What is a verb stem? What is a vowel? What is a stem vowel?
4 Some verb change their stem vowels this happens in the du, er, sie, es forms only the only vowels that change their stems are e and a. e can change to ie or i a can change to ä the verbs that do this must be memorized
5 Verbs changing from e to i essen geben sprechen