1. The ability to syntax or structure (grammatical competence) represents the knowledge of languages, knowledge of vocabulary. The structure of the sentence, as well as spelling and pronunciation
2. Social Skills (Sociolinguistic competence) refers to the use of the term. And sentence structure appropriate to the context of society as an apology to you to ask directions and other information and statements, etc.
3. The ability to use the language to convey the speech. And write (discourse competence) refers to the ability to link between language structure (grammatical form) with the sense (meaning) of speaking and writing on a form. And the situation is different
4. The ability to use tactics of interpretation (strategic competence) refers to the use of techniques to ensure successful communication, particularly communication of speech. If the talks with the tactics of the conversation, it will not stop in the middle. As the use of body language (body language) to extend the terms of other words that I do not say so.