the reason why.is that.结构中的is有时态变化 吗?

The reason why is that.帮忙分析这个英语结构 the reason why...is that...造句 带汉译 That is the reason why 是指... 有that'S why 这个句型吗..不是the reason why is that /it's because th the reason why 和the reason that有区别吗 The reason why I love this festival is that the 【the reason is that +句子】 与 【the reason is why +句子】的区别? 英语复合句问题~the reason why...is that... The reason why……is that…… 用 the reason why...is that 造两个句子! the reason why is that造句5个 This is the reason why/that she was late for school.两句话有什么区别