This juxtaposition allows for immediate application. You read the rule, and moments later, you are testing it. This loop is the most effective way to retain complex grammatical structures.
At B1, you can no longer rely solely on the Perfekt (spoken past). You must master the Präteritum (simple past), especially for auxiliary verbs ( haben , sein , modal verbs ) and narrative texts. Grammatik Aktiv provides extensive drills to differentiate when to use which tense and how Grammatik Aktiv B1- Pdf Download Fixed