however 和 therefore

however 和 therefore However用法可不可以 ; however,还有therefore的用法和however therefore和as a result;on the other hand 和however; furthermor so与therefore区别?however与nevertheless区别? therefore, besides, otherwise, however这种词可否引导状语从句 therefore 和so therefore和so的区别 Therefore和Thus的区别 so和therefore的区别 英语 常见的承接副词例如therefore,however,whereas,furthermore之类的,越多越好,加中 衔接词（英语写作）比如however besides therefore consequently thus ,请再帮我 however和however much的区别