1、go straight on 是词组,意为“直走”“直接去”,“勇往直前”等意思.一般情况下go straight on+ 宾语
Turn left at the next corner and go straight on.
下一个拐角左转然后直走。
Go straight on untill you come to a shop.
直走,直到一家商店为止。
2、go straight down表“顺着,沿着……往前走”,比如go straight down the road就是“沿着这条路往前走”
She saw all her plans go down the tubes.
看到她所有的计划付之东流