Hi. Please help me understand the English conjunction.<br/><br/>What is the most appropriate conjunction here?<br/><br/>"You seem to have had that car for year." "Yes, I should sell it ( ) it still works.<br/><br/>I know that the most appropriate word here is 'while'.<br/><br/>But could I use 'provided' or 'if' instead?<br/><br/><br/>Hope your reply. Thanks.