ask for sth 意思是?2.有没有ask sb for sth.

ask for sth请求,要求e。g。I have asked for backup。我已经要求增援了。ask sb for sth向某人要求/请求某物e。g。If you need, please ask your teacher for information。如果你需要,请向你的老师要求更多的信息。