1 of 11

GRAMMAR 4:1

Necessity

120

2 of 11

It is not necessary to read the chapter.

I don’t have to read the chapter.

Choice

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​

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3 of 11

It is not okay for you to use my phone.

​

I mustn’t use your phone.

Nojin, you mustn’t use my phone.

x

4 of 11

It was necessary for you to come to class on time yesterday.

I had to come to class….

5 of 11

It wasn't necessary for me to pay to get into the nightclub.

​

I didn’t have to pay

6 of 11

It is very important to me that you read this novel.

​

I must

You must read this book!

7 of 11

It is not necessary to wear a coat. It isn't very cold.

​

I don’t have to wear a coat.

8 of 11

It is not okay for you to enter the pool without taking a shower first.

​

I have to take a shower.

9 of 11

Do not make any noise.

Prohibited

You mustn’t make any noise

You must be quiet

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10 of 11

It is necessary for me to go home because I have a headache.

​

I must go home

11 of 11

It was unnecessary for me to study a lot when I was a child.

​

I didn’t have to study...