一个英语的完成时问题there has a tree 和 there has been a tree 两者有什么区别?还有顺便跟我说说完成时什么时候要用has been done什么时候直接has done

一个英语的完成时问题there has a tree 和 there has been a tree 两者有什么区别?还有顺便跟我说说完成时什么时候要用has been done什么时候直接has done 关于延续性动词完成时的问题He has stayed there for 2 years.He stayed there for 2 years这两句话有什么区别? He has often been there.不用完成时怎么说 请教一个完成时语法问题Setup was completed successfully.Setup has completed successfully.上面的句子同样是完成时,用was和has意思有什么区别, 关于英语句式的一个问题“Such hazardous impacts (has)have the problem exerted on society,there is much reason to justify the attention to its root.”这一句中应该用have 还是has? 是完成时还是过去时what has she accomplished?what degrees has she gotten?what awards has she rcceived?when did she receive them?以上提问是不是只有最后一个问题用过去时而其他的用完成时? 有关英语的问题He has been working all day.他整天都在工作.这个现在完成进行时的句子能变成否定形式吗? 一个简单的英语句子...Nobody has been there,（ ）（ （反义疑问句） 根据所给的线索回答问题,然后把字母填到相应的横线上完成一个谚语①If the capital of England is London,circleL.If not,circle U.②If there are five rings on the Olympic flag,circle YIf there are six,circleV.3 If a frog has Com here,please.Don't go there.这是一个英语问题,求它的意思 what's your sales record been like there?英语句子问题请问这句话里的what's是what has对吗,否则后面的been无法解释.然后be like 为什么不用at there 或者in there? 完成时用在there be句型中怎么用?是has还是have? 一个英语现在完成时态一般疑问句的问题拜托了各位 谢谢当它是第三人称的时候 比如：He has studied English for three years.这句话怎么改成一般疑问句呐? has提前那studied要不要变成study? 帮我解决 现在完成时的has gone has been问题where has John gone?To the library.He has been there an hour.第二句是不是他去那里已经一个小时了?为什么要用has been 而不用has gone呢?has gone 不是表示去了哪里还没有回来吗 英语 现在完成时与现在完成进行时的问题Mr.Chen______ the company five years ago,that is,he______ the company for about five years until now.A.has taken charge of ,has been taking charge ofB.took charge of ,has been taking charge ofC.t 解决一个英语小语法问题is there any book here?说这里的there be充当谓语那么可以is there having any book here?现在进行时 关于has been的用法一个是he has been died for 3 years一个是he has been beaten上面是三年前死了 下面是被打都是has been 这种完成时的句式 但是怎么分析下啊 英语的完成体是指什么?完成时?