what would you like to eat?中为什么要用would?would在这句话里是什么意思what would是词组么?

题目

what would you like to eat?中为什么要用would?would在这句话里是什么意思what would是词组么?
这句话里would为什么要用过去式,

答案

would英音：[wud]美音：[wud] 助词 v.aux.1.(will的过去式,表示过去将来时)将She said she would come.她说过她会来的.2.(表示意志)愿,要;偏要I told her to stop nagging,but she just wouldn't listen.我叫她别再...