Would it change the meaning of the sentence if I say "pass by" instead of "pass under"?

Native speaker’s answer
Rebecca
Yes, it would change the meaning! Here, the words "by" and "under" function as directional differences. When you say "pass by", it usually means to the side or next to you. However, "pass under" refers directly to underneath you or an object. If perhaps, the river was next to them and they stood on the river bank, "pass by" would be appropriate. Since they are on a bridge that is over the river, "pass under" is used. Ex: Wait for the cars to pass by before you cross the road. Ex: Charles, can you pass the ball under the bench?