nether nor与either的意思和so that的意思与用法？

neither nor指既不...也不...
Neither I nor he can go.我和他都不能走．
either 指”也”的意思，用于否定句
He can't go there, I can't either.他不能去那，我也不能．
so that指太...以至于...或是”因此”
He is so short that he can't reach the light.
他太矮了以至于够不着灯．
He is short so that he can't reach the light.
他很矮因此够不着灯．