请问为什么要用having been separated?而不是用to be separated?Having been separated from other countinents for millions of years,Australia has many plants and animals not found in any other country in the world.

I am upset.I have been having problems with my parents.请问为什么用having problems ? Having been in high school for a whole month.请问这句话为什么开头用having been?是什么语法知识? The fight for India's freedom had been won without a battle having ever been fought. 请问如何翻译battle 后面为什么跟 动名词 having 呢? 请问为什么要用having been separated?而不是用to be separated?Having been separated from other countinents for millions of years,Australia has many plants and animals not found in any other country in the world. I admit having stolen his money.请问这里的having I admit having stolen his money.请问这里的having 为什么要用having stolen? ___ (found)in 1636,Havvard is one of the most famous universities in U.S.A.为什么要用Having founded 不用Having been found ,founded如何分析这句是不是分词的完成式? 英语语法达人进oh come on you know that having been subject to arrest .I have the right to know the charges.请问为什么用having TOM is not having been trained as a dancer is her own regret.这里为什么要用having been done呢,直接用done 可以吗? 英语-He's already been sent for请问这里为什么要加一个been ? this is one of the best novels having ever been written by him.为什么用having I regretted having been so rude to him,这句为什么用having? It's+been++a+long+time.been在这里起什么作用?为什么要用been _____ several times ,she dicided to leave the bad manA having hurt B having been hurt C hurting D to hurt这道题为什么选B having是什么用法 为什么要用having? 用having been done 造句 高中完成句子：Everything（having been arranged)well,the party will begin at 8 o'clock as planned.为什么要用having? having been done 为什么不能做定语? having been done 为什么不能做定语? the two old sisters,having been separated for years,held each other and burst into tears .为什么用having been separated 不用 had been separated