Thanks for your reply!
I'm not sure how to describe the trouble. I don't have problems picking up the vocabulary or anything like that, it's all the grammar I can't get a handle on. I understand each concept as it is presented to me, and if I work on it for a while it sticks pretty well, too. Just as soon as I have to take a test that combines as many as two of these concepts, however, the whole thing turns into a jumbled mess. This is what confuses me (as it did with math not so very long ago -- still does when it comes to calculating tips

), if it was just something I didn't understand, I could learn it. I HAVE learned it, though; my brain just can't seem to figure out how to sort all the information and retrieve what I need when I need it. Incidently, even though my abilities with the english language (I'm a native speaker) have been evaluated at well above average, I've never learned the specific grammatical concepts for that, either

. None of it sticks.
This is the best description I can come up with, I hope it's useful.
Thanks,
Kris