The narrator has introduced quite a few new words in this one, but not in the usual manner. We’ve now been introduced to the family of German words which have their origin in Latin words. These words end with the -ieren prefix (pronounced EE-en). Some examples:

• Demolieren -> To Demolish
• Studieren -> To Study

In the past, we were told about the “formal you” — Sie (pronounced zee). When used like this, we were always supposed to use the to form of the verbs — verkaufen, schlafen, etc.

In lesson 15, we’re acquainted with the “informal you” — Du. With this, we’re also told about a new way to write the verbs. In their “to” form, these verbs end with “en”; here, we replace the “en” with “st”. Some examples:

• Do you have to come?
  • Informal you -> Mussen sie kommen?
  • Formal you -> Musst du kommen?
• What are you buying?
  • Informal you -> was kaufen sie?
  • Formal you -> was kaufst du?