連接詞,與However (請英文高手來回答)

有一本托福的文法書 書名叫:托福電腦化測驗 TOEFL-CBT (封面有一張CD的圖案那本) 有一題一樣的題目常在不同章節出現 我舉其中某題來發問 Salmon are actually born in freshwater lakes, however they spend most of their adult lives in sea water. 此句中哪裡錯誤? 答案是however的地方 書中說,要嘛就改成but 要嘛就是however前面要分號( ; ) 理由是說,因為一個句子有二個子句 一定要用連接詞... show more 有一本托福的文法書
書名叫:托福電腦化測驗 TOEFL-CBT
(封面有一張CD的圖案那本)
有一題一樣的題目常在不同章節出現
我舉其中某題來發問

Salmon are actually born in freshwater lakes, however they spend most of their adult lives in sea water.
此句中哪裡錯誤?
答案是however的地方
書中說,要嘛就改成but 要嘛就是however前面要分號( ; )
理由是說,因為一個句子有二個子句 一定要用連接詞 如but連接
或是用分號把一個句子拆成二個句子
however只是個副(adv)
但是我拿了文馨英英漢辭典、文馨最新英漢辭典、無敵cd816 pro電子字典
查however這個字
字典裡都說however是conj也是adv
並且字典裡的例句如下

文馨英英漢辭典:
It is mine, however you may use it.

文馨最新英漢辭典:
However long a vacation is, I always feel I want a few days more.
However tired you may be, you must do it.
He will never pass the examinations, however hard he woks.

無敵cd816 pro電子字典:
However hot it is, he will not take off his coat.


上面幾個辭典裡的例句
都是我找出來的 一個句子裡有二個子句
而且是用however連接...

請問however 倒底是不是連接詞
如果是的話
那 托福電腦化測驗 TOEFL-CBT 裡的那些題目
不就行得通 無需改成but 或 分號 however

有人能解答一下嗎
Update: to 彩色豆子

噗...
那是托福裡的文法選錯題啦
他會在題目中 取四處加底線 並為A、B、C、D四選項
要大家選錯的啦
而however底下有底線 為一個選項
其他幾個我沒列出來而已啦...
Update 2: TO 白毛弱虫也~~

但是我找了好多本辭典
都說however是conj及adv....
2 answers 2