Easiest Way to learn grammar rules?

<p>Yeah so I'm having trouble with the writing grammar sections of the SATs.
Although English is my second language, I'm fluent in the language but I just never really learned all these grammar rules throughout school.</p>

<p>I'm planning to take the SATs in March and I'm scoring in the mid 400s on practice tests, high 400s at best. (without the essay). I need to get atleast a mid 500 in writing!</p>

<p>So yeah my question is: What should I do in order to learn all these grammar rules to help me on the writing section? I'm looking for a quick and efficient way!
I heard Sparknotes the seven deadly errors is good, but i'm open to anything good!</p>

<p>bump :)</p>

<p>no replies :(</p>

<p>I’m using the ultimate guide to sat writing book by Erica somethingorother</p>