曾经: 1. once2. at one time3. (refers to something that happened previously)Relative explainations: Examples:1. 被告否认他曾经遇到过她。 The accused man denies that he has ever met her.2. 她曾经爱过我，但现在已成往事。 She loved me once, but that's all ancient history now.3. 大英帝国曾经占有过世界上的大片地方。 The British Empire once covered large parts of the world.4. 我们曾经住在伦敦。 Once we lived in London.5. 他在青年时代曾经有过想当钢琴家的雄心。 In his youth he had the ambition of being a pianist.6. 古埃及人曾经拥有高度文明。 The ancient Egyptians had advanced civilization.7. 他不提他曾经和她见面。 He made no mention of having met her.8. 人们认为海洋曾经是生命的发源地。 The sea is thought to have been the cradle of life.contribution to projects曾经参与项目He has seen better days.他曾经风光一时。You had your innings.你曾经走过运。We were schoolfellows.我们曾经是同学。He has travelled(over) the whole world.他曾经周游全球。He was once an army man.他曾经是个军人。We once traveled inland.我们曾经在内地旅行。I've been sworn to secrecy.我曾经被迫宣誓保密。Once we lived in London.我们曾经住在伦敦。rhinoceroses were once plentiful here.这儿曾经有许多犀牛。今后: 1. hereafter2. from now onRelative explainations: Examples:1. 今后请准时。 Please be punctual in futurity.2. 我们今后一星期没有见面的机会了。 We have no chance to meet each other a week hence.3. 希望今后两国人民之间有更多的交往。 We hope from now on there will be more exchanges between our two peoples.4. 今后任何违反秩序的行为会受到严厉惩罚。 From now on any violation of the regulation must be cruelly punished.In a future time.将来，今后The time to come; the future.今后；将来What's next?今后将怎样？From now on从现在起，今后We must keep on doing so.我们今后还要这样做。For the future, try to be more careful.今后要更加小心些。From now on we must be very careful in the selection of cadres.今后选拔干部要严格。What are our future tasks? 今后的任务是什么呢？OUR CHIEF TASK AHEAD IS BUILDING UP THE COUNTRY今后的主要任务是搞建设I shall is careful hereafter.我今后一定要加小心。
