I don't know of any, but what I did was basically copy the grammar PDF that was given, but write that out myself. I find that I learn best by writing stuff and then just having it on my study table to look over everyday.
... , having a solid understanding of grammar may sound intuitive, but when ... truly helps (much like how grammar assists with the LSAT). Otherwise ...
... 's parsing logic or verbiage / grammar or eliminating answer choices. If ... go slowly - it's hard grammar / wording, NA and other curvebreakers ...