MODALSWILL PROMISE, CERTAINTYI WILL GIVE YOU A LIFT TO SCHOOL. SPONTANEOUS DECISIONI WILL HAVE THAT DRESS. PREDICTIONIT WILL RAIN. ( I HAVE PROOF) ASSUMPTIONSTHAT WILL BE TOM AT THE DOOR. UNCERTAINTY(WITH VERBS OF BELIEF) E.G. BELIEVE, THINK, SUSPECT, ASSUME, PRESUME....I THINK YOU WONT PASS THE EXAMMAY/MIGHT POSSIBILITYIT MAY BE WINDY TODAYEQUIVALENT FOR MAY/MIGHT ITS POSSIBLEITS POSSIBLE TO BE WINDY TODAY.COULD POLITE REQUESTCOULD YOU DO ME A FAVOUR...POSSIBILITY (LINKED BY A CONDITION)I COULD HELP YOU IF I HAD TME (IIND CONDITIONAL)SHOULD ADVICEYOU SHOULD SEE A DOCTORMUST OBLIGATION/INTERDICTIONYOU MUST OBEY YOUR TEACHERS (OBLIGATION)YOU MUSNT SMOKE IN A HOSPITAL.(INTERDICTION)EQUIVALENT FOR MUST HAVE TO (WEAKER THAN MUST)I HAVE TO WEAR A UNIFORM TO SCHOOL.CAN ABILITYEQUIVALENT FOR CAN TO BE ABLE TOI CAN SWIM/I AM ABLE TO SWIM.