For this chapter you need to study the following:
Find your words in the purple parts of chapter 3.
These can be found in the exercises you have to do and the purple bits in your book.
Should (p. 82), also check out this link: http://www.grammar.cl/english/should.htm
Imperative (p. 85)
Word order (p. 90)
Spelling & Grammar A2: 02 grammatica (online)
Here is your worksheet about word order.