“There has been great changes in computers in the last few year”为什么是 has been不是have had

there has been的用法 There has been a misunderstanding. there has been...为什么要加been? 小学阅读英语习题7道.An exciting trip激动人心的旅行 I have just received a letter from my brother,Tim.He is in Australia.He has been there for six months.Tim is an engineer.He is working for a big firm and he has already visited a grea there has/have been的用法 he has been there _twice____.画线提问 We love,difference has always been there. He has never been there.英译汉 翻译:She has never been there,has she? He has been there for six months.为什么不是has been in there? there have aways been people 正确么?there have aways been people 和there has aways been people哪个正确? there have been怎样用?there have beenthere had beenthere has been有心向求学 用现在完成时,there have been 和 there has been造句,各造5个 he has been there [twice]就划线部分提问【 】he been there 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 It has been there since a t_ years ago . He has been there twice 划线提问twice