A general grammar that can be used for any occasion. "Die Deutsche Grammatik - Ein Handbuch für den Ausländerunterricht" by Langenscheidt is a widely recognized standard work in learning German as a foreign language. It serves as a reference source and helps foreigners in the correct use of the German language. The variety of examples and declension examples, the clear structure, and the detailed tables make it suitable for teachers and advanced students. The grammar takes into account the current scientific state of the language, incorporates the rules of the new spelling, and offers updated examples. The additional blue shade provides a clearer structure and greater usability.