"at sb.'s request"那个's是怎么个用法?为什么要加's呢?还有I bought it at your request.这句话中 your后面怎么没有’s?

at sb.'s request那个's是怎么个用法?为什么要加's呢?还有I bought it at your request.这句话中 your后面怎么没有’s? keep distance from sb./sth.at sb's request up to now~request sb.to do sth.on the way~in theway in this way~in a way by the way 9个短语造句 both jack's request and Mike's own能不能换成 at both jack and Mike's request为什么呢? request sb.to do造句 as your request at your request 区别 have sb.at one’s back造句 request 的句型是什么?request sb to sth? request sb to do与request to do的区别 request.s是什么 request sth from / of sb 翻译 request sb to do与ask sb to do 区别 是lose one's temper at sb还是lose one's temper to sb at one's ease with sb的中文意思 shout one’s name ,shout to sb,shout at sb区别 sb's+sb's和sb+sb's的区别 send sb a request for sth make/send a request to sb for sth 意思是什么解释清楚点,顺便给个例句send sb a request for sth make/send a request to sb for sth at one's age =at the age of= when sb.was/were shoot at sb 和 shoot to sb 这两个的区别 那个是 射中了 那个是 超某人射去不见得打中谢谢