I enjoy learning the rusty old rules. For instance I am quite convinced that there are some instances in which it is technically wrong to use an adverb, although most people seem to flout this rule. I am convinced that this is a rule because when I see the usage it strikes me as wrong. However, I haven't been able to track it down quite yet, and I know that most people wouldn't care anyway... I think it may be this rule: People seem happy to make things adverbs that do not, or should not, be adverbs. I try not to get pedantic about these rules as I know most no one cares except for me but I enjoy them and enjoy knowing them and enjoy knowing I am using language "correctly" - although I also love my ain't, my jargon, and my slang in casual speech. I think language is fun.Rule 2. Adverbs that answer the question how sometimes cause grammatical problems