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3 Grammar

A. The verb must

We use must to express obligation.
We use mustn’t to express prohibition.
AFFIRMATIVE

I/You/He/She/It/We/You/They must go
NEGATIVE
I/You/He/She/It/We/You/They mustn’t go (= must not)
QUESTIONS
Must I/you/he/she/it/we/you/they go?
SHORT ANSWERS

Yes, I/you/he/she/it/we/you/they must.
No, I/you/he/she/it/we/you/they mustn’t.

 You must do the project today.
 You mustn’t eat in the classroom.

Complete with must or mustn’t.

1. We leave! The film is going to start.
2. You shout. You’re in a library.
3. Oh, Mum, we go home now? I want to
stay and play with my friends.
4. You eat this fish. It isn’t fresh.

B. Future will

We use the Future will for predictions or on-the-spot decisions.
AFFIRMATIVE NEGATIVE QUESTIONS SHORT ANSWERS
I I I I I
You You you you you
He He he he he
She ’ll go She won’t go Will she go? Yes, she will. No, she won’t.
It (=will) It (=will not) it it it
We We we we we
You You you you you
They They they they they

Complete with will or won’t.
1. I’m hungry. I make a sandwich.
B. Read again and complete the 2. I think my sister become a doctor one day.
sentences.
3. Mum, don’t clean my room. I do it.
1. The children are going to do a
4. Jack win the game. He isn’t a good player.
project on .
2. The is a good place to Frances must do a project and give it to her
find information about China. 4 Speak teacher tomorrow. Talk in pairs and say
3. says the capital of what she must or mustn’t do.
China is Shanghai. • watch TV all • play computer
4. and are afternoon games She mustn’t
shouting in the library. • go out with • search the net watch TV all
5. The capital of China is . friends tonight • find pictures afternoon.
• visit library
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Book_To the Top Plus_SRB_1.indb 105
Book_To the Top Plus_SRB_1.indb 105 12/9/2022 4:07:30 µµ