Dear Teachers,<br/><br/>1) "There is no standard method for xxx yet."<br/><br/>2) "There is still no standard method for xxx."<br/><br/>3) "There is still no standard method for xxx yet."<br/><br/>Which one(s) is/are the good useage(s)?<br/><br/>Thank you all.<br/><br/>Best regards,<br/><br/>Zeyar