quanyanhei
Cget paid,paid在此是个过去分词形式。 表示:被付报酬那些清洁工是按小时来被付报酬 (直译的)(另:貌似我回答过好几个LZ的问题,LZ是否考虑增+悬赏分啊,呵呵)
火山红虎
请背出来:pay sb. by the hour 按小时支付 by the week 按周 by the month 按月sell sth by weight 按重量出售(没有the)take /hold / catch sb. by the 身体某一部位hit sb. in the face ,但: hit sb on the cheekhit sb.on the 身体某一部位 buy sth. by the dozen 按打地