however 和 thereforeForm September ,therefore,I'm going to stay in Beijing with my aunt and uncle when my cousin joins the Navy. 改错中把therefore改成however.怎么区分二者?

but和however区别 however 和 though区别 however but 和however 的区别 however和but的区别 however 和 nevertheless的区别 however和nevertheless的区别? 如何区分instead和however 如何区分instead和however anyway和however的区别 However和but的区别和用法 however 和 but怎么区分用法?RT! however和but有什么区别 .however 为什么不能和although 连用 but和however有什么不同? Nevertheless 和however 有什么区别 however和nevertheless有什么区别? however和nevertheless有什么区别?