语法改错，这句怎么改

语法改错，这句怎么改

there 后加will追问你确定...追答As for me, there (will) be a younger
brother or sister at home. I will be very happy.追问iwill前面是逗号不是句号这是一个句子追答对于我，马上会有小弟弟或者小妹妹。我很快乐。追问不是句号。。。I will前面是逗号试卷上是逗号追答那就改为：
As for me, there being a younger brother or sister at home, I will be very happy.追问我们老师说把I wil be very happy改成I will being very happy....但是我感觉这真的不太可能，对吗为什么要那么改?追答这样一改，there being ... 就叫做独立主格结构，表示原因，作原因状语。你们老师的改法是绝对错的，will后必须是原形动词，不可能是being。你们学校不会只有一个英语老师吧？去问一下别的英语老师一切就会清楚的。你别急着采纳，弄清楚后再采纳不迟。如还有疑问，欢迎追问，有问必答，确保正确！追问哦哦谢谢你了追答谢谢采纳

As for me, there being a younger brother or sister at home, I will be very happy. 把原来句子的动词原形变成现在分词作状语，主句就是I will be very happy

这不是个if从句吗，没if啊追问所以叫语法改错追答应该是As for me,if there is a brother or sister at home,I will be very happe.

首先句子的错误肯定在中间
想要表达的中文意思是家里有一个弟弟或妹妹（如果）
①其实用if, 比较通常，是一下子会想到的，If I had a younger brother or sisiter at home （虚拟语气）
②there我查了一下也不是不能用，但是我不确定，大二了还是没学到过，自己本身还是英语专业汗
根据例句
There being a "collapse of civilization" or "rapid population decline" might be a better forecast.
若说会出现“文明崩溃”或“人口急剧下降”，那还更有道理。
there be改成 there being 应该对