In contrast to such modal verbs English as a can, and may, at the modal verb must only one form — must in the simple present tense. And this form indicates that the operation refers to the present or a future time. For example:
He must take better care of himself. — He had better take care of yourself.
Must you leave tomorrow? — You have to leave tomorrow?
The indirect speech in English modal verb must not undergo any changes, and tenses in this case does not work:
The boss said to the secretary that she must leave the office at 5 pm — Chief Secretary said that she must leave work at five o’clock in the evening.
Himself modal verb must be responsible for the expression of obligation in English. But, as has been said, it is only one form which is present tense. If we want to use our speech is the function of «obligation», but talking about the past or future time, our services modal verb have to. Or the equivalent of modal verb must — to be obliged to (They were obliged to fulfill his order. — We had to obey his orders). For information about modal verbs and examples of its use, you can see in the article devoted to him — «modal verb HAVE TO».
When we use the modal verb «must»?
As usual, we will look at the situation when we need it the modal verb to express:
- The duty, necessity or dolg.Vot what will be translated at the algorithm use the modal verb must:
Smb must (has to) do smth — someone needs to, someone has to do something;
Smb had to do smth — someone had to, had to, someone had to do something;
Smb will have to do smth — someone will have to, have to do anything;
When it comes to the use of the modal verb must with the first person singular (namely with the pronoun «me» — I), implies that a person puts on a light commitment to do something, for whatever your inner principles oblige yourself to do that -or. This nuance is quite important because it is the difference between modal verbs must and have to function in the «ought.»
My matches have fallen out. I must go and buy them. — I lost all matches. We need to buy more.
He realized he must do it. — He realized that he should do so.
I must study English. — I need to learn English.
- The ban in negative sentences.
You must follow the instructions and must not press the button. — You must follow the instructions, you can not click on this button.
You must not come home late. — You can not come home late.
Note that the modal verb must mean it is strictly forbidden to do anything that is passed to the word «impossible.» If we just want to explain what you should not do something or not to do something, it means that this is not necessary, it does not matter (even if they do, it does not matter), we ask for help modal verbs have to, and need (which is also discussed in a separate article — «The modal verb NEED»). In this case, they will have a negative form — do not have to, and need not.
Must we hurry? You need not hurry! — We are in a hurry? No, we do not need to hurry.
Must I send the fax and sign the contract today? — You need not send the fax, but you certainly must sign the contract. — I send a fax and to sign a contract today? Fax can not send, but it is necessary to sign a contract.
- Persistent council order.
You must not cry. — No need to cry. Do not Cry!
You must stay here. — You must stay here!
You must read more books in the origin. — You should read more books in the original.
- Assumption. This feature regards affirmative sentences. If you remember, in the description of the features of verbs can and may we use the percentage scale to determine it as a percentage of the degree of certainty or of doubt, which has a particular modal verb. So, the modal verb must have 90% certainty, the probability that the events described happened, is happening or will happen. This assumption can be sure to translate into Russian using the words «should be probably seems likely, probably.»
He must be here already. — He’s probably already here.
What everybody says must be true. — That, as they say everything is likely true.
He must be very strong. Look at his bicepses. — He must be very strong. Look at his biceps!
When we expect something in the present time, it is advisable to use the infinitive long time — infinitive continuous.
He must be living somewhere in Crimea. — He probably lives somewhere in the Crimea.
They must be playing in the yard. — They must have been playing in the yard.
And, of course, are not ignored perfect infinitive after a modal verb must. He expressed a certificate of completion of action.
She must have been about twenty then. — She then was probably twenty years.
He must have forgotten about it. — He must have forgotten about it.
He must have failed to get tickets. — He must have failed to take the tickets.
This topic is closely related to the other as described in the articles that need to pay attention:
- «The modal verb HAVE TO»
- «The modal verb NEED»
- «Should, must or have to — a modal verb to choose? »
- «The modal verb TO BE TO»
- «The modal verb SHALL (SHOULD)»
After reading them, we recommend to pass the following test: «Test # 2 on the use of modal verbs in the English language.»