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Aim: Students will identify that the modal verb “must” (mustn’t) has a regular
form for all persons.
Students must wear a lab coat, they mustn’t forget it
Read
1. Look at the picture and underline
the corresponding options to complete the
sentences.
A) The picture shows…
B) The picture shows …
a) a school laboratory.
a) things you should do.
b) a park.
b) clothes you must wear in a laboratory.
c) a school playground.
c) clothes you must wear at school.
2. Read the dialogue.
Laura: Good morning Miss Herrera. May I come in?
Miss Herrera: Good morning Laura. Yes, but
you
must
wear your lab coat. Put
on it, please.
Laura: I forgot it.
Miss Herrera: What a shame but, you can’t come in. Look at me;
I must
wear a
lab coat too.
You
mustn’t
forget it because it is required to be in
the laboratory.
Laura: Please. I promise I won’t forget it again.
Miss Herrera: Let me see if I have a lab coat in the locker.
Laura: I hope so.
Lesson 42
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