Gisela Darrah 
Merk dir das! Grammatik bis B1 
German Grammar explained in English

German Grammar is explained in English with many examples in German, followed by exercises. You can compare your solutions to the solution part at the end.
Great for studying German on your own, but also suitable for German classes.
All exercises fill a page, copying is permitted.

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Gisela Darrah is an experienced teacher of the German language. She knows the most common difficulties and explains these parts especially before the exercises.