Learn German with Lengura on Instagram: "German Prepositions IN, AN and AUF Explained 🎓🇩🇪 | German Grammar A1-A2 This structured A1-A2 German grammar explanation will help you finally understand how to use the German prepositions “in”, “an” and “auf” correctly. in = in/ inside 👉 Ich liege im Bett. = I am lying in bed. This means, I am lying under the blankets. auf = on (on top of) → horizontal contact 👉 Ich sitze auf dem Bett. = I am sitting on the bed. an = at/ by → vertical contact 👉 Ich