I have learned a lot that way .这句话中为什么直接用that way ,而不用by tha

I have learned a lot that way .这句话中为什么直接用that way ,而不用by tha I have learned a lot that way.这里that way需要加by么?这里为什么不加by?tha i have learned a lot that way.是什麽意思? I've learned a lot that way. I've learned a lot that way.a lot成分? l 've learned a lot.that way?期中that前为什么不用with Yes.l have l ve learned a lot that way. 连词成句：that ,have,a,you,lot,way,learned i learn a lot that way 在that way 之前为什么不能加by或with? I have learned a lot that way 麻烦翻译准确点 I've learned a lot that way.为什么省略了in? l have learned ______ that way a.lot of b.a lot c.a lot of