Answer:
They are: listening, speaking, reading and writing. Most likely, your first few Chinese classes will focus mostly on listening and speaking, and will gradually incorporate reading and writing as you go, since these are the most difficult of the four.
A proposition is a semantic structure composed of two or more concepts linked together through linking phrases to create units with meaning (Novak & Gowin, 1984). ... In this sense we can say that a proposition is a declarative sentence.
