please, read the parts that I mentioned below from chapter 1 to 6 than discuss and analysis these topics ever one in separate paragraph.

please, read the parts that I mentioned below from chapter 1 to 6 than discuss and analysis these topics ever one in separate paragraph.
The introduction should be about the linguistic and the every paragraph in the body will be about one important part from the six chapters.
Do not use summary or sources.
The impotent topics:
1- Studying linguistic structure (chapter 1).
2- Why languages change (chapter 2).
3- Speech act theory (chapter 3).
4- Unity of structure (chapter 4).
5- Word classes and phrases (chapter 5).
6- The morpheme (chapter 6).
Check the Contents in the E-book