1) Necessity or obligation a) have to b) must c) need d) can e) should f) might 2) obligations that are nor strong or its a good idea a) can b) might  c) haven d) should e) musn 3) express, ability, permission , general possibility a) must b) have to c) can d) could e) might 4) Express ability, permission and future possibility a) have  b) must c) should d) could 5) permissions and possibilities a) may- might b) have to- must c) should- shouldn't

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