Go along this street,and then turn left.
go along 沿着...走
此短语本身就有"一直往前走"的意思,所以不必再加ahead.
这是七年级《英语》课本下册课文里的句子。
Go along this steet ,and then trun.这是最简单易懂的
Go ahead this street,and then turn left.
Go ahead along this street,and then turn left
Go ahead along this street,and then turn left.