neither /so的简答用法。

neither ...表示“也不。。”
so ..... 表示“也。。”

上文说了肯定句时我用SO
否定我用Neither
请问我是根据句形，还是句意来答？
例：
he is not happy 简答（neither am I)我也不开心

可此句he is unpappy 简答（so am I/neither am I )我也不开心
《有“也不”应是用SO》但就竟用哪个？？？怎样跟学生作解释？
烦请告知。谢谢！

无疑问he is not happy 简答（neither am I)我也不开心

so ,neither 倒装 关于neither,either,too,so,also的用法 neither have i和 so have i 的区别? 请给我讲讲关于so nor neither的倒装 neither do I so do I so I do的区别 he dislikes rock music. so is she为什么不用neither is she I don't think I can walk farther. A.neither can I B.so can I C.neither do I D he dislikes rock music. so is she.那为什么i can hardly hear you.用neither can she????? I didn't know the answer,__. A.so does heB.so did heC.nor did heD.neither he did(理由) If you don't go there,______.A.so do I B.so will I C.neither do I应该选哪个?