This chapter distinguishes between compound structures and compound sentences. It also teaches how to create diagrams for these new sentence structures. It seems pretty straight forward, and the homework worksheet was not confusing for me at all after I read through the chapter. 

I have been wondering about this for a few chapters now, but haven’t worried about it too much because I’ve been guessing correctly thus far, but how do you know where a prepositional phrase goes? I know that the prepositional phrase should be below whatever it is modifying, but sometimes it seems like it could arguably be placed anywhere. My problem is specifically with Exercise 3.3 question number 7. I assumed that the prep phrase would be placed below “angry” because angry has lasted “for three days,” but the answer key says it should be below “has been”. I somewhat understand it, but for future instances such as this, I need further clarification. 

I agree with almost everyone else about this chapter. I found the content, while important and relevant, remedial. I do not always adhere to all of the rules, since I do speak in a certain dialect. However, in formal speaking and writing, I know how to correctly implement these rules.

I think the only thing I learned from this chapter was that you can decide if you should use a comma between clauses depending on their length. I had never heard that before and it really clarified a lot. I feel as though commas are probably one of the most incorrectly implemented punctuation marks in the English language. However, who determines how long is long enough for a compound sentence to get a comma?