You are looking for a helpful feature that covers German grammar rules from A1 to C2 level in a PDF format. Here are some resources that might be helpful:

Deutschlernerblog

: Provides an excellent PDF of irregular verbs categorized specifically by levels A1 through C2.

Most textbooks mix grammar topics. One chapter covers A2 Perfekt , the next jumps to B1 Nebensätze . Without a clear overview, you might:

2. Comprehensive Grammar & Vocabulary "Leitfaden" (Schubert Verlag)

Verb Conjugation:

Mastering regular and irregular verbs in the present tense ( Präsens ).