Examples
nǐ men你们xué xiào学校zhēn真hǎo好，hái还bāng帮nǐ men你们bào xiāo报销lái huí来回de的jī piào机票。
你们学校真好，还帮你们报销来回的机票。
Your school is so kind to reimburse you for the return airfare.
你每次来回都是公司的车子对吧？
You always go there and back in the company car, don't you?
汤姆在车流中来回穿行。
Tom zigzagged between the cars.