Environment

Up and Down
We’ve seen that 上 and 下 have many different uses. Here's another: you can add 来 and 去 after them to say things like like come down or go up! Notice that the word order is switched in Chinese.​
上下
上去​
go up​
下去​
go down​
上来
come up​
下来​
come down​
What’s more, you can put these phrases after 走 or 跑 to show what direction you’re walking or running. ​
走跑
走上去​
walk (and go) up​
跑上去​
run (and go) up​
走上来​
walk (and come) up​
跑上来​
run (and come) up​
走下来​
walk (and come) down​
跑下去​
run (and go) down​
走下去​
walk (and go) down​
跑下来​
run (and come) down ​