问大神们，an hour drive back down to Forks的drive是动词往回开还

Its a four-hour flight form phoenix to seattle, another hour in a small plane up to Port Angeles,and then an hour drive back down to Forks.感觉上a four-hour flight、another hour、an hour drive是三个并列的表语，有迷惑性的是an hour drive back down to Forks的drive是动词往回开还是名词车程？

你说的没错，a four-hour flight、another hour、an hour drive是三个并列的表语。地图上表示方向常用up to“北上”，down to“南下”，drive不是动词，而是名词，故副词back 不修饰名词drive，而修饰介词短语down to，back down to“往回南下到......”作后置定语修饰drive。