In Prepositions^x, Present continuous^x, Vocabulary^x

My tips:Look at the photoalbum: http://picasaweb.google.com/Sean.Pigg/MimsAndSeanSHouseWith an elementary/pre-intermediate student these pictures could be used to teach:1. The vocabulary of house and living.2. Present simple by asking: What do they usually do in this room/ place? (interrogative,...

"I am not understanding" isn't wrong, it's just uncommon and awkward. "I am understanding" is present continuous and "I don't understand" is simple present. In some contexts "I am not understanding" could be more correct than "I don't understand" as the latter implies a lack of capability in...