争取答案: how much extra do you want (或者like) me to pay you? how much ** the extra payment for th** service? how much do you want for th** extra service? how much more should i pay for th** premium service? 注意, extra可以说形容词也可以是副词。此外,“额外服务”要看具体情况,有时这种服务叫做"premium service"(高档服务),也可以叫"optional service" (自选服务) 20210311