Al-Jazeera offers a grammar test. There are a couple of pitfalls. So, reason enough to take a look at the most important Arabic grammar topics.
Episode #2 of my series "9273 roots": 20 questions for the man who brings Arabic to South-East Asia: Badrul Aini Sha’ari.
Reading grammar books in Arabic can be challenging if you cannot decode the language of the grammarians (i'rab إعراب). But there is a formula.