When we use must not and should not?

When we use must not and should not?

The main difference between the two words “should” and “must” is that “must” is a stronger word, as mentioned before. The probability of “must” is much more than that of “should.” For instance: You must do your homework now.

Where do we use must and should?

Both “must” and “should” are model verbs. The term “must” is commonly used to express any unavoidable requirement or obligation. On the other hand, “should” is used as a probability, obligation, advice, recommendation, conditional, and exceptional mood.

What is the difference between must be and should be?

‘Should be’ is said to be a modal auxiliary and is used to express the possibility that something could happen in the future. ‘Must be’ is said to be a modal auxiliary used to express and state a duty to be done or an unavoidable obligation.

Why do we use must?

We usually use must to talk about obligations which come from the speaker and we generally use have (got) to when we refer to obligations that come from outside the speaker. I must buy some new clothes. Mine look so old. The obligation is from me to buy new clothes.

When can you use must?

Must is used to express obligation, give orders and give advice. It can only be used for present and future reference. When the past is involved, you use have to.

What is the negative form of must?

The negative form of must is mustn’t. We don’t use don’t/doesn’t/didn’t with must: There mustn’t be any rubbish left.

What is the use of must not?

We use must not to say that something is not permitted or allowed, for example: Passengers must not talk to the driver.

Should have uses?

Should have means that something did not happen, but we wish it had happened. We use should have to talk about past mistakes. A worried mother might say: “I was so worried about you.

Should not examples?

I have an English test tomorrow. I shouldn’t worry if I were you. I never have enough money. I don’t think you should go out so much.