The four skills that I'm talking about are listening, reading, writing and speaking. The language systems are grammar, vocab, pronunciation and discourse. By the way, ladies and gentlemen, remember, it's always vocabulary. It's never plural. Okay? Vocabulary is never plural. It's an uncountable noun. There are some other words as well that you should remember are never plural. And another one is information. You never say informations or, and you never say an information. It's always some information or some pieces ofinformation. So those language systems, grammar, vocabulary, pronunciation and conversational skills. Let me just kind of go through those points and