If i were ,would i have shooting pains up and down my left arm?
这里的Up and down应该是做副词啊,为什么可以直接加arm?
介词?
追答对的,此句中 up and down 是介词。
如果它后面没有直接跟名词,如:
My little daughter started jumping up and down with rage when sheheard she couldn't go.
这时 up and down 才是副词,以修饰前面的 jumping