Form: Subject + Should + Base form . Use : Should is used to express what the speaker thinks is right or the best thing to do . It expresses mild obligation or advice . Shouldn't expresses advice about things not to do . e.g You should take your medicine regularly . You shouldn't take your medicine on an empty stomach . lExercise page : 13 – 14 Clause is a group of words that contains a subject and a verb . There are two kinds of clauses : 1. main clause can be a separate sentence , and it’s information is complete . 2. dependent clause depends on a main clause for its complete meaning . It's not a complete idea , so it cannot be a sentence by itself . Use The word When shows that two steps happen at the same time . Form Use imperative in the main clause . Include the subject ( you ) in the dependent Clause . You can put either the main clause or dependent clause first in the sentence . if The dependent clause comes first , it is separated from the main clause by a comma (,) Exercise 9 &10 pages 15 - 16 Put on a gown : 1. Wash hands . 2.Put on gown with opening in the back . 3. Fasten ties at back of neck , and waist to cover clothing . Remove a gown : 1. Unite or break ties at the back and neck . 2. Pull from the neck and shoulders then arms , turning inside out as gown is removed . 3. Roll gown into bundle and discard in appropriate waste . 4. Wash hands . Exercise pages 18-19