That may be true, but it's not taught any more in high school and middle school...it's not even in the book anymore. It is a dying art. When kids can't use "their, they're, there" correctly or simple things like "I and Me", and irregular verbs are almost impossible to get across to some of them....deal with the word "tooken" for a while and see how you feel, "like" and "as" don't seem that important anymore.