Can/could May/might Must/[had to] Ought to Shall/should Will/would
MUST I must contact the school for further information. HAVE TO He said that we have to be at the train station by 7:00. HAD TO SHOULD/OUGHT TO We should clear away the mess in the kitchen.
DONT HAVE TO/DONT NEED TO/NEEDNT You dont have to dress formally today. DIDNT HAVE TO He didnt have to invite everyone to the party.
С AN/MAY Can/May I use your phone, please? MUSTNT/CANT You mustnt/cant park here.
CAN+PRESENT INFINITIVE Going to the gym can be boring. COULD/MAY/MIGHT+PRESENT INFINITIVE She might get lost. COULD/MIGHT/WOULD+PERFECT INFINITIVE He could have come with us, if he hadnt missed the train.
CAN I can speak Italian fluently. COULD I could sing quite well when I was younger. WAS(NT) ABLE TO I was(nt) able to find all the answers to the questions. COULDNT I couldnt read or write when I was four.
MUST So he must be on his way home. MAY/MIGHT/COULD It may be broken. CANT/COULDNT That cant be Ian!
COULD You could at least have called to cancel it yesterday. SHOULD He should call us back. OUCHT TO You ought to be more careful.
CAN Can I/we give you a hand? WOULD Would you like a cup of tea? SHALL Shall I give you a lift? С AN/COULD We can go out.
WILL He will call me tonight. SHOULD/OUGHT TO The weather should/ought to get better tomorrow.
SHOULD You should stop smoking. OUGHT TO You ought to abide by the rules. SHALL Shall I enter the competition?