Error recognition (have to, should, must)

I’m sorry we had ask you.

• sorry

• had

• ask

• you

Answer explanation

We need 'to' after have

to talk about rules and necessary things.

In my opinion, all schools has to have a school uniform.

• opinion

• all

• has

• have

Answer explanation

After plural subject, we use have to instead of has to.

Studying is great, but you shouldn't has to sit down all day.

• studying

• but

• has

• down

Answer explanation

should is used to give advice. should + infinitive (bare verb / verb 1).

eg. She should buy a present for me. (correct)

She should buys a present for me. (incorrect)

I don’t must go to bed early at weekends.

• must

• to

• early

• at

Answer explanation

We don't use do / does in using must/should/will or any other modal verbs

We use must and have to to talk about rules and things that are necessary. 

eg. He hast to practice English every day. 

• Ok, I got it.

• I'm still confused. 

In the past tense we use had to. There;s no past form of must.

eg. You had to study harder.

• Ok, I got it.

• I'm still confused. 

Don't / didn't have to means that it is/was not necessary to do something.

eg. She doesn't have to answer that email.

• Ok, I got it.

• I'm still confused. 

We use musn't when sometjing isn't allowed.

eg. We musn't cheating on exam.

• Ok, I got it.

• I'm still confused. 

We use should when whe think it is a good idea to do something.

eg. I should buy a present for my mum.

• Ok, I got it.

• I'm still confused. 

Please make sentence using have to / must.

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