If you're struggling with grammar, you're not alone! Many GMAT and GRE students tare surprised by the level of grammar knowledge that the tests ask of them. Thankfully, there's a ton of free resources available to you! Let's talk about a few of them.
The first of these resources is Magoosh English! We offer a free grammar refresher course to complement your test preparation. Many students haven't studied grammar since primary school, and Magoosh English is a great starting point to review the most important grammar concepts.
We also have many grammar blog posts that you can find right here. They're written for the GMAT, but they're useful for GRE students as well.
One of the most useful grammar resources is Purdue University's Online Writing Lab (OWL). OWL covers almost every grammatical topic. Magoosh test-prep experts themselves use this resource when they have questions!
While you're practicing the AWA section, you should check out Grammarly. It's a free plugin that annotates the mistakes you make while writing in your web browser or Microsoft Word and other office suites. Grammarly is a great tool to help you to figure out which orthographic and grammatical mistakes you make the most frequently.
Finally, here is a list of other high-quality free resources for all grammar students, including ESL students!