Ability
Which modal verb do we use to express ability in the present?
Can
Which modal verbs do we use to express obligation?
Must, Have/has to
Which modal verbs do we use to give advice?
Should/ought to
Which modal verbs do we use for ability?
Can, could, be able to
Which modal verb do we use to express ability in the past?
Could
Which modal verbs do we use to express prohibition by laws and rules?
Mustn't
Can ought to be used to express ability?
No
Which modal verbs do we use for probability?
should/ought to
Is it possible to use could for present abilities?
No, it is not.
Is 'should' a modal verb to express obligation?
No, it isn't
Can should be used with ¨to¨?
No.
Is must a modal verb to express possibility?
No, it isn't