Here are some pdf handouts summarizing various aspects of Greek syntax:

Syntax Quick Reference

Greek Cases

Genitive Case
Dative Case
Accusative Case

Greek Verbal Tenses

Present Tense
Imperfect Tense
Perfect Tense

Greek Participles

Participles Overview
Adverbial Participles

Greek Verbal Moods

Imperative Mood
Infinitive Mood

Greek Prepositions

The Preposition ἜΝ

Other Greek Syntax

Conditional Sentences