求问be agreed on sth 与agree on sth 的区别.（表告诉我一个是主动一个是被动）

求问be agreed on sth 与agree on sth 的区别.（表告诉我一个是主动一个是被动） 求问keep doing sth与keep on doing sth有什么区别? sth is be on sth be on fire be agreed I agreed on this plan.与I agreed to this plan.有什么区别 be busy with sth 与be busy doing sth be keen on后面加什么be keen on后面加doing sth;do sth;还是to do sth? keep on doing sth与keep doing sth 的区别 search for sth.与search on sth.的区别 determine sth 与 determine on sth 有何区别? be agreed be agreed后为什么还要加upon呢? against doing sth,与be against doing sth的区别 attach to有依恋于的意思吗?如果有的话,与be dependent on sth有什么区别? impress sth.on sth. 英语翻译an extension may be granted with agreed uopn business case与合同有关的 be strict on还是in还是about sth 英语翻译求翻译英语短语.the modern and ancient Olympic Games//are widely accepted as//have been classified into//on a regular basis//reached the agreed standard//be admitted as//have the opportunity to（//为间隔分开不同短语）