Hi teachers,<br/><br/>I have two questions about this. Please help me with them.<br/><br/>1. Mary is abusing staff.<br/><br/>Does that mean<br/><br/>she always abuses other colleagues.<br/><br/>She is abusing a colleague right now.<br/><br/>2. Can I say "I'm good a good staff"? How to do with staff when it's singular?<br/><br/>Thank you very much in advance.<br/><br/>Tinanam