however

　　adv.无论如何；不管怎样（语义上=anyway,atallevents）引导状语从句.

　　conj.然而；可是（语义上=whereas,while,nevertheless,but,yet）,用于引导【并列句或链接并列成分】,可以位于【居首,句中或句末】.

　　例如：

　　Youranswer,however,iswrong.

　　However,youransweriswrong.

　　Youransweriswrong,however.【转折连词】

　　Weshouldtryallouttofinishthetaskintimehoweverharditis.【连接副词】

　　【However连接副词,引导状语从句】colditis,shealwaysgoesswimming.