You understand simple sentences and can express yourself in a simple way in day to day situations.
You can already apply more complex grammar and understand frequently used expressions.
You are able to speak simply but continuously about yourself and familiar topics.
You already have a large vocabulary repertoire and lead conversations on a normal/good level for many different topics.
You express yourself very clearly, well-structured and in detail on complex social or professional issues and understand challenging texts.
Without much effort you communicate spontaneously and fluently and understand very complex issues.