英语翻译this has not been easy because i own over a thousand boo

英语翻译this has not been easy because i own over a thousand boo This has not been easy because i own over a thousand books.这 This has not been easy because I own over a thousand books. 我想请问你一下新概念二52课中 This has not been easy because i own over a I own over a thousand books 和 I have over a thousand books的区 this has not been easy与this is not easy区别 This has not been easy 和 this is not easy 不是一个意思吗 this has not been easy.中has not been什么意思?怎么来的?具体点 英语翻译Why has not gone ahead ah this afternoon ,I am easy to t I own over a thousand books为什么要加a,不加可以吗? I own over a thousand books,they cover every inch of floor s I has always been coming over like this