| Present | Past | Future | ||
| CAN To be able to , . | CAN am is able (to) are I can do it. (I am able to do it). ( , ) . | COULD was able (to) were I could do it. (I was able to do it). ( , ) . | ‑ shall be able (to) will I shall be able to do it. ( , ) . | |
| MAY to be allowed (to) , . | MAY am is allowed (to) are You may go home now. . | MIGHT was allowed (to) were He said I might smoke here. , . She was allowed to go home. | ‑ shall be allowed (to) will You will be allowed to swim. ( ). | |
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| Present | Past | Future | ||||
| MUST | MUST I must do it now. . You must not do it. . | ‑ | ‑ | ‑ | ||
| TO HAVE (TO) | Have to Has I have to do it now. () . | Had (to) I had to go there. ( ) . Did you have to go there? We did not have to go there. | Shall have to Will You will have to go there. ( ) . | ‑ | ||
| OUGHT (TO) | ought (to) We ought to help her. ( ) . | ‑ | ‑ | , , . | ||
| SHOULD . | should You should not go there. ( ) . | ‑ | ‑ | You ought to have done it yesterday. . You should have helped him. . | ||
| NEED , , . | Need You neednt hurry. . | ‑ | ‑ | , . You neednt have done it. ( ) . | ||
| TO BE (TO) , , , . | am are to is The train is to arrive at 10. 10. I am to go there. . | was (to) were He was to attend the seminar. . | ‑ | , , . They were to have met. ( ). | ||
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| MUST | He must be working now. , , () . You must be tired after our work. , , () . | He must have been working for same hours. , , () . He must have finished his work. , , () . |
| Should Ought (to) , | He should be about 40. , , 40. He ought to be at home. , , . | The train ought to have left. , , . |
| CAN ( ) | She cant be so stupid. , . | He cant (couldnt) have said it. , . |
| MAY | He may be working now. , . He may be at home now. , , . | He may have left the key on the table. , , . |
CONTINUOUS
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