MODEL AUXILIARY VERB (HELPING VERB) CAN, COULD, MAY, MIGHT, WILL, SHALL, WOULD, SHOULD, MUST, OUGH TO, HAVE TO, NEED, DARE, USED TO (DESCRIBING MOOD) • CAN/COULD (ABILITY, POWER, CAPACITY) • ABLE TO (ABILITY, POWER, CAPACITY) IN FUTURE DON’T USE BOTH IN ONE SENTENCE CAN I BORROW YOUR PEN? (INFORMAL) (REQUEST/PERMISSION) COULD/WOULD I BORROW YOUR PEN? (FORMAL) (REQUEST/PERMISSION) CAN USED FRO PROHIBITION, ORDER, OFFER CAN USED FOR GENERAL/FACT COULD USED FOR LESS POSSIBILITY/SUGGESTION COULD HAVE FOR ACTION NOT DONE • MAY (MORE POSSIBILITY) , MIGHT (LESS POSSIBILITY) NOT USED WITH POSSIBLY/LIKELY MA...
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