请问ask for ,request for是同意词吗

请问ask for ,request for是同意词吗 request for sth与ask for sth有什么区别 request for 请问：ask for help request和ask for有什么区别?并举例说明 请问,ask for是否等于ask sb for?ask sb sth 是一个双宾语结构吗?如果是,那可否变成ask s 请问 ask for the order request for leave,ask for leave如何用,例如,我想请2天假怎么说 ask for help是一个完整的动词吗?应该ask sb for help 或ask for help from s make request for forbidden request for：/ a request for advice