■ for a while 相当于awhile，意为“一会儿，暂时，片刻”。例如：Let's rest for a while/awhile.（咱们休息一会儿吧。）
办理宾馆退房手续 check out of the hotel
A：Can I help you, sir?
先生，需要帮忙吗？
B：Yes. I need to check out of the hotel.
是的。我需要办理宾馆退房手续。
■ check out 表示“办理（宾馆、旅店等的）结账退房手续”。例如：I'd like to check out.（我要办理退房。）We checked out at noon.（我们中午退的房。）
离开宾馆 leave the hotel
A：What time will you leave the hotel tomorrow?
你们明天几点离开宾馆？
B：Well, we must check out of the hotel by 12 a.m. and we'll leave before that.