What are some fun ways to use in class to help students understand English grammar?

Comparing one language to other an be one way .I use this technique with my students .It works also in making them understand that every language has its own set of rules to be followed Also this would help them remember the grammar rules in English.

There are plenty of techniques.for instance,teaching grammar by using short stories that contain the same files you want to achieve in your objectives,after designing your lesson plan