For quick reference, all grammar structures are listed here (linked back to the appropriate unit or directly to a PDF).

Cases:

Cases in German (review) 2.2

The Dative Case 2.4

The Genitive Case 5.4

Prepositions:

Dative Prepositions 2.4

Definite and Indefinite Articles Chart (Preposition review) 5.10

Verbs with Prepositions 5.18

Pronouns: 
Reflexive Pronouns 5.2

Personal Pronouns in the Dative and Accusative 5.14

Relative Pronouns and Clauses 5.20 / 10.4

 

Verbs and Tenses:
Modal Verbs in the Simple Past 3.4

The Future Tense 5.2

Subjunctive (present-time) 5.22

Simple Past Tense 6.4 / 10.2

Past Perfect Tense 6.6

The Passive Voice 7.2

Subjunctive (past-time) 10.8

List of Irregular and Mixed Verbs

List of Verbs with Prepositions

 

Other concepts
Indirect Questions 5.4

Adjective Ending Chart 5.8

Infinitives with and without zu 5.8 / 10.8

“weil” and “deshalb” to indicate a reason 5.12

“obwohl” and “trotzdem” to indicate a contradiction 5.12 / 10.4

Verbs with Prefixes 5.16

Da- and Wo- Compounds 5.18

2-Part Connectors 5.19

um … zu / damit 7.2