Modal Verbs: may

Modal Verbs: may

May is used with the indefinite infinitive to express permission, possibility or probability in the present. It can also be used to make polite requests.  

Modal Verbs: can

Modal Verbs: can

Can is a modal verb that can be used to indicate ability, permission, or possibility. Here's how it can be used in different tenses and forms: present, future, indefinite passive, indefinite infinitive