however

然而、不过、可是

The plan sounds risky; however, it may be our only option.

这个计划听起来很冒险，不过可能是我们唯一的选择。

无论多么、不管多

However hard I try, I can never remember her phone number.

无论我多努力，就是记不住她的电话号码。

到底怎么、究竟如何口语

However did you manage to finish the whole report overnight?

你到底是怎么在一夜之间把整份报告写完的。

无论以何种方式、不管怎样

You can arrange the furniture however you like in your room.

你房间里的家具想怎么摆就怎么摆。