however
adv.無論如何；不管怎樣 （語義上=anyway,at all events）引導(dǎo)狀語從句.
conj.然而；可是（語義上=whereas,while,nevertheless,but,yet）,用于引導(dǎo)【并列句或鏈接并列成分】,可以位于【居首,句中或句末】.
例如：
Your answer,however,is wrong.
However,your answer is wrong.
Your answer is wrong,however.【轉(zhuǎn)折連詞】
We should try all out to finish the task in time however hard it is.【連接副詞】
【However連接副詞,引導(dǎo)狀語從句】 cold it is,she always goes swimming.