1
The modal verbs of obligation are:
Must, Have to
Might, may
Should
Could, can
2
The modal verbs of abilty are:
Could, can
Should, must
May, have to
Might, can
3
The modal verb of advice are:
May, have to
Must, can
Could, might
Should
4
The modal verbs of permission are:
Can, could, may
Must, could, might
Should, can, have to
Could, should, must
5
The modal verbs of Possibility are are:
Have to, can, might, may
Might, may, could, can
May, must, should, can
Could, should, have to, may
