must mustnt needent 1

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MUST: It is necessary 
to do something. 
I must put the rubbish 
out.It smells awful. 
MUSTN’T: It is 
forbidden to do 
something or it is the 
wrong thing to do. 
You mustn’t feed the 
animal at the zoo. 
 
 
NEEDN’T: It is not 
necessary to do it,you 
don’t need to do it. 
You needn’t buy a new 
pencil.I will give you 
one. 
FILL IN THE BLANKS WITH “MUST” or 
“MUSTN’T” 
1.You …………… cross the stree when the traffic 
lights are red. 
2.We ………… leave right now.We are going to be 
late for school. 
3.Susan has got a very important exam 
tomorrow.She ………… watch TV. 
4.The students ………….. run in the corridors.They 
might fall. 
5.You …………. go out without your coat.It is 
freezing outside. 
6.We ………….. protect the animals and 
environment. 
7.If you want to go to university,you ……………. 
study regularly. 
8.We ………….. obey the traffic rules.It is very 
important for our safety. 
9.People ………….. cut down trees if they don’t 
want to increase global warming. 
10.Students ………… cheat in the exam.It is 
nothing but theft. 
11.People ………… be polite to each other and 
shouldn’t hurt each other’s feelings. 
12.You ………….. buy those tomatoes.They are 
rotten. 
13.We …………. buy some flour and a few eggs.We 
will make a cake but we haven’t got any flour and 
eggs. 
14.You …………… park here.It is forbidden to park 
here. 
 
FILL IN THE BLANKS WITH “MUSTN’T” or 
“NEEDN’T” 
1.You ……………. buy any more bread.We have got 
plenty. 
2.I have studied for the exam for more than 
six hours and I understood every detail.I …………. 
study more. 
3.Jack has just painted the bench.You ………….. 
sit on it. 
4.We ………… speak loudly in the library.Other 
people might be disturbed. 
5.You …………. bring any food for the party.We 
have got enough food. 
6.You …………. eat or drink in the classroom.The 
teacher might be angry. 
7.We …………… buy any CDs.We haven’t got a CD 
player. 
8.George …………… eat fast food.He is very fat 
and fast food is unhealthy. 
9.The students …………. bring their books today 
because they are going to visit the museum. 
10.People …………… throw litter on the floor. 
11.We ………….. shout at each other when we are 
discussing something.It is very rude. 
12.Jack …………… buy another car because he has 
got three already. 
13.You …………. go near that dog.It might bite 
you. 
14.We …………… buy that book.Peter has got the 
same book,so he can lend it to us. 
 
FILL IN THE BLANKS WITH “MUST” “MUSTN’T” or “NEEDN’T” 
1.People ……………… save the tuna fish,otherwise they will be extinct in the future. 
2.We ………………… kill the seals.We ……………. protect them.They are very lovely animals and they have a right 
to live as we do. 
3.You …………… put the pizza in the refridgerator.It is already gone off.Just put it in the bin. 
4.The students …………….be careful reading the questions.Most of the wrong answers are due to 
misunderstandings. 
5.You …………. buy any tickets for the match.I have got two and I will give one of them to you. 
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