<p>1.) You may not use my mobile phone! (emphatic refusal)</p>
<p>2.) Might I have a word in private? (very polite requrest)</p>
<p>3.) I may see you at the weekend. (not sure about something)</p>
<p>4.) She wondered if she might borrow some money. (past request)</p>
<p>5.) They may have forgotten all about it. (positive request)</p>
<p>6.) May I have your attention please. (polite request)</p>