Do I need the hyphen in:<br/><br/>He works <b><i>part-time</i></b>.<br/><br/>He is a <b><i>part-timer</i></b>. (Meaning a part-time employee.)<br/><br/>He is <b><i>part-time.</i></b> (Colloquial to mean that he works part-time.)<br/><br/>Thanks.