请问 have yet to和be yet to有什么不一样,该怎么用呢?

请问 have yet to和be yet to有什么不一样,该怎么用呢? 英语：yet-to-be什么意思请问yet-to-be什么意思,要怎么用? 英语翻译为什么不写作 have not yet to be resolved? yet-to-be-presented I have yet to see the results ; details are yI have yet to see the results ; details are yet to be worked 请问 Yet to us have yet to do 和have not yet to do 的区别.越详细越好.thanks a million -I'd like to invite you to my birthday party on Friday evening .-Thank you,but ___I'll have time,I'm not sure at the moment.A if Bwhether Cwhat Dwhich （为什么要选B,不能选A,A和B有什么区别）2.Is Science Museum open to the public yet?Ye 请问一句英语 关于yet和stillThey have been planning to attend the show,but they _____ have not had the opportunity.这里为什么不能用yet,只能用still呢? I (yet) have some more important problems to deal with.yet 和still的区别yet 和still的区别题：I (yet) have some more important problems to deal with. have something done和need to be done如题 请问have to be done ,need to be done怎么使用?是什么时态?表示什么时间段? 英文歌 耶耶耶耶耶 ye ye ye ye ye Primetime Sexcrime I try .Except英文歌 耶耶耶耶耶 ye ye ye ye ye Primetime Sexcrime .Primetime SexcrimeConfess,you did it for sexan holy sin today instead it was a blessExcept to be caught in a trap Di The best is yet to be. ____your parents____(be)to beijing yet?为什么 This warehouse is yet to be activated. may yet prove to be怎翻译? The best is yet to come.请问为什么加to呢?yet是副词吗?他是修饰be动词?还是修饰come的呢?谢谢. Have you worked out the math problem yet?Not yet ( )another hour I can work it outA Given B To be given C Giving D Having been given