Du oder Sie? For many of you, who come to Germany, this concept of duzen (using informal du) and siezen (using formal Sie) can be new. The other day, we had a discussion about die Anrede at school. Many of the students in our group come from China, Iran, Armenia, Spain, and so on. They can draw a parallel between the usage of these pronouns in German and their mother tongue. Basically, you shall use Sie when:
On a Saturday night I chatted with friends of mine in German on a bus on my way home. There were three of us. None of us is German; nevertheless we preferred German language to English in order to get some speaking practice.