I have been given two tickets for the new play at the Young Theatre on Sunday.为什么要用现在完成时的被动语态?他怎么和一般现在时的被动语态区分开来?

I have been told that the lecture ______ by Professor zhang tommorrow is about envirment protectionA.given B.being given C to be given D having given i am sorry to（）you so much trouble A have given B have been given C have been giving D giving这道题选什么,请说明 I appreciated () the opportunity to study abroad two years aog.A .having been given B.having beenC.to have been given D.having been robbed主要求解释. 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 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 I greatly appreciate（）the opportunity to study abroad two years ago.A giving B have been given C give D having been given 分析时态,句子成分, 谁知道I have given you I have given up on I would have given much to have been able to call off the whole thing.求详解、翻译、 -----My boss often made me work day and night.----If i -----you,i ----the job.if i were you,i would have given up the job?还是if i had been you i would have given up the job --Alice,why aren't you at work today?--I _____a day off.答案是have been given 为什么不是was given The men left as soon as they ______their orders.A had been given B are given C have been givenA had been given B are given C have been given D given have been given the gift of great wealthI have been given the gift of great wealth,but I believe with great walth comes great responsiblith 请不要用机器回答， I have been selling I have been trying I have ever been I too have been I have been to.