many years before和many years ago的区别如题

many years before和many years ago的区别如题 可以说since many years before He had been killed __________.A.many years agoB.many years before为啥子? how many years will have to pass______scientists succeed in providing a treatment for cancer?a,until b.before until 和before 的区别. five years before 用法和five years ago的区别 ten years before 和ten years ago 有什么区别? 5 years ago 和 5 years before 如何区分? many.Years. Every few years和for many years是什么意识 怎样区分how many和how many years it may be many years before the situation in that area improves.请翻译,而且为什么用before? it was many years before american women were given the rights to vote翻译下, It was many years before american women were given the rights to vote翻译, how many years will you have completed before traveling to your host country How many years have you worked here?____ten years ago.为什么不能用Before而要用since? travel back many years 和travel ahead many years哪个对? we have been good friend for many years goodfriends 和for many years 句子成分 It was many years later_ I had an opportunity TO DO IT again.请问是为什么不用BEFORE而用了THAT?能否顺便提供一下BEFORE和THAT用法的区别?那么BEFORE的用法又是什么>我记得有在IT后面跟上BEFORE的.