have/has been后接地点名词时,中间为什么要加to

have/has been后接地点名词时,中间为什么要加to 不可数名词后接has还是have? 请问has/have been to＋地点名词 all 作名词时后面的谓语动词什么时候用单数,什么时候用复数?例：All can be done (have/has) been doneAll that can be eaten (have/has) been eaten1L 我不是那个意思，是选has 还是have have/has been+done 是什么时? 现在完成时进行时“have/has been后是不是+doing? 现在分词是什么意思?过去分词又是什么? Have/has been 后一定要加doing sth.吗? have has(在第3人称单数后都会用has)那物主代词用have还是has?说具体点!比如：My car has been mended.为什么要用has啊?my不是第一人称吗? there have been 和there has been是怎么用的 是there have been+可数名词复数；there has been +可数名词单数或不可数名词吗如there have been many books about historythere has been life on earth for millions of years怎么感觉 have,has,have been,has been在什么情况下用啊? 英语中have been；has been是什么? has been doing have been done区别 have been 和 has been的区别 has been have been的区别 has been和have been区别 has been doing 的用法看到一句话：it has been a favorite magazine sinc i was a child.has been 后面接了名词,这是属于什么时态的用法呢?是have been doing have been they have been doctors中been后直接加名词doctors.那为什么have been to China中必须加to等介词才能加名词China? 过去现在时 have /has been doing和have/ has +过去分词的区别