Unfortunately, nothing specific; you might check with a local academic on this; as rules of grammar are always undergoing some degree of change.
I have to agree with the advice that the best way to learn (and most writers tend to say the same, in my experience) is to read; and, what is more important, read carefully and pick carefully what you read. As for being able to diagram sentences, name the proper techniques/parts of speech, etc., that comes in handy if you're doing analyses/criticism (that is, actual criticism, not capsule reviews or "I like"/"I don't like"), but it isn't necessary for writing well -- again, most writers wouldn't be able to tell paranomasia from paranoia; they don't need to; they've absorbed the use of proper english over a lifetime of reading with care and attention. Look for those writers who are known for their storytelling ability and for use of the language. Read writers who are considered the best examples of proper writing, and get lost in their language, let it sweep over you and revel in it; then sit back and look at why it works -- not the technical terms, but why it captivated you, what held you there instead of throwing the book against the wall. Usually the two things go hand in hand. And don't be afraid to go back through, once it's written, and edit, paying attention to whether your sentences parse, where it may be clumsy or too bald, where you may have overdone the description or adjectives, etc., and adjusting accordingly. Let the writers who are considered classics be your guide on this -- and there are definitely some sf/fantasy writers who fall into that category. But first of all, WRITE, don't worry about the technical side of it, or even too much about proper grammar and such; get the story down, THEN go back and carefully rework where it needs it. This can be a tedious process, but it's necessary to both keep the excitement of new work and to perfect your style.
), I learned how to do so by reading a lot, and by reading pretty much anything I could get my hands on. After awhile, if you've read things that have their grammar correct for the most part, your use of correct grammar will become more or less second nature.
