What are some of the grammar rules of English that you were taught in school that now seem a little odd?

Question

Also, what are some of the common standard rules of grammar that you see frequently violated in written forums and in somewhat formal spoken forums?

Answer 1

For the first question, rules having to do with gender. Thus, "everyone shall pick up his pencil" in a class full of girls and boys.
For the second question it would be case, i.e. I vs me, who vs whom and so forth

Answer 2

I can't think of any rules I learned that seem odd, but I do have an answer to your second question.

A rule that is often violated is the incorrect use of the word "I." Because children are often corrected for saying, "Me and Susan are going outside," many people grow up thinking "Susan and I" is always correct. But "between Susan and I" is incorrect, and "between susan and me" is correct. Many, many people don't know that.

Answer 3

The fact that weatherwise is not a word-I hear people use it all the time.
frequently violated is the use of punctuation. I hate it when people never end or begin a sentence in a forum. They just use use one big long one.