I found chapter 4 to be relatively easy. I think, more than anything, it should me that we often use words and phrases as we are talking that are grammatically incorrect. Exercise 4.1 and 4.2 were easy. I had some difficulty with exercise 4.3, because I felt like I had to focus on what the modifiers (adjectives/adverbs) were supposed to modify. Like, in question1 “The union negotiators are ONLY asking for a small increase in salary.” I had a hard time determining where “only” needed to go. I had a similar issue with question 8 “The magician EVEN has one more trick up his sleeve.” The correct answer is “The magician has even one more trick up his sleeve,” but I wanted to put “even” at the beginning of the sentence. The final chapter exercise combined these new concepts. I had a question about 10, “Kittens can sure be curious.” I took “sure” completely out, but the correct answer is “Kittens surely can be curious.” With a little extra practice, I am sure these concepts will become easier.