there has been a need for sth 不懂为什么是there has been?真是什么时态呢,.

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/22 08:19:32

表示对这个sth一直有这样的需要
是there's 跟has been语句的复合句型
再问：？？？为什么有这样的复合句式呢 there has sth不是错误的么。。。不懂。。。抓地。。。
再答：不是there has sth,而是there is sth 与 has been a sth的复合英语语法里面这样两种基础语法的复合有很多，更复杂的也有要理解清楚一点，还是要把每一个最基础的语法、时态等搞搞清楚

there has been a need for sth 不懂为什么是there has been?真是什么时态呢,. 在线等!求大神分析这句下语法...there has been a need for sth He has been there for six months这里的has been是什么时态 there has been...为什么要加been? He has been there for six months .为什么句中有been,有什么作用? He has been there for six months. He has been there for six months there has been a time和there had been a time有什么区别? 为什么是How long has he been there 而不是How long has he gone there He has been there for six months.has been后面为什么不加to?还有为什么要加fo he has been there _twice____. there has been的用法