This lesson is a review, but it also introduces an important new tool for real conversation: how to express an opinion in a polite, connected way, instead of short disconnected sentences with no link between them.
The most useful phrases are Ich finde, dass... (‘I find that...’) and Ich denke/glaube, dass... (‘I think/believe that...’). The key word here is dass (‘that’), a connector that opens a subordinate clause, called a Nebensatz. The crucial rule to watch for: the moment dass appears, the conjugated verb jumps immediately to the very end of that subordinate clause, instead of staying in second position the way it does in every ordinary sentence you've learned so far. Example: Ich finde, dass Deutsch schwer ist, never dass Deutsch ist schwer.
This can feel quite different from languages where the word order after a connector like ‘that’ stays the same as in the independent sentence. German instead enforces a strict rule: any connector of this type — dass, weil, ob — pushes the conjugated verb straight to the end of the subordinate clause. This is one of the hardest structural points for many learners, because it breaks the word order pattern that every earlier sentence in your German journey has followed.
Beyond that, this lesson also gives you practical phrases for managing any conversation: agreeing (Ich bin einverstanden), disagreeing (Ich bin dagegen), asking someone to repeat themselves when you don't understand (Wie bitte? or Können Sie das wiederholen?), and expressing preference with lieber (‘rather/prefer’) and am liebsten (‘most of all, favorite’). These two words are originally comparative and superlative forms of gern (‘gladly’), and they always sit directly after the conjugated verb: Ich trinke lieber Tee (‘I'd rather drink tea’), Ich esse am liebsten Couscous (‘my favorite thing to eat is couscous’).
The most common mistake is keeping the normal sentence word order after dass instead of sending the verb to the end, writing Ich finde, dass ist Deutsch schwer or dass Deutsch ist schwer instead of the only correct form: dass Deutsch schwer ist.