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