as good as几乎像xxx一样好.good是形容词,用来形容名词.
as long as,作为介词使用.只要
as long as you are here,i ll never leave.只要你在这里我永远不离开.
as well as,像xx一样好,well 是介词,用来形容动词或者形容词.
也表达像xxx一样的意思.