A) In General • The usual restrictions on the use of modals remain valid: They cannot be used with the will-future, they have no infinitive, no to-infinitive, no -ing form, and no past participle. You must be freezing out there! He could be in class. Using must conveys a strong feeling of certainty; nevertheless, there is still some doubt in the speaker’s mind. Could, may and might - English Grammar Today - a reference to written and spoken English grammar and usage - Cambridge Dictionary Must – to express a formal request or necessity I must … Might – for possibility The electrician might be finished by tomorrow. May – to suggest a possibility It may rain this evening. He must live near here because he always walks to work. might, may, could. She might be stuck in traffic. Attention: ‘ could ’ and ‘ to be able to ’ have a slight difference in meaning; for details, have a look at this explanation. (Perhaps he has died, but we don't know.) She may have gone home early. Might Not vs. Could Not. Must can be used in the same way to show certainty in the past. They could have worked late. He might/could have died. But when we want to say that something was possible but did not happen, we use might or could: He was very careless when crossing the road. Must.

I could have caught the bus if I had hurried. This is an interactive online exercise about modal verbs of probability such as can, can, could, may and might. He may/might/could have died. He may agree with you. We use might, may or could to say that we think something is possible but we're not sure. They may be late. The term probability is used in mathematics as a ratio. Peter might come to the party. Modals of Possibility and Probability with Continuous Tenses ... Must, could, might, may, couldn’t, can’t, may not and might not are used to show how certain the speaker is that an action is presently occurring or not occurring. He's not answering. Modals of Possibility and Certainty: MAY, MIGHT, COULD, MUST / CAN'T, etc. (I didn't hurry, so I didn't catch the bus.) Probability also describes something that might occur, the chance that something might happen. Might. He might have brought the cake. Although might and could express possibility in a similar way, the negative forms of might and could are different. (He didn't die.) He must have won the game. Neither do the ones dealt with here, in these meanings, have a past form.

Come inside and get warm. She's not here yet. It might be bad weather tomorrow.