besides有连词词性吗?词典上说是副词,但是我觉得不是啊,besides后面基本上都有逗号的,到底怎么回事?但是有这样的一个句子：Iwantedtobuyabook.However,Idon'thaveenoughmoney.however貌似是连词，但

Question

besides有连词词性吗?
词典上说是副词,但是我觉得不是啊,besides后面基本上都有逗号的,到底怎么回事?
但是有这样的一个句子：
I wanted to buy a book.However,I don't have enough money.
however貌似是连词，但是后面有逗号啊！到底是怎么回事！
P.S.我的一个美国朋友说这是连词，不是副词，到底是怎么回事！
再P.S.那为什么他会说besides是连词呢？肯定有原因啊！而且我也凭语感觉得它是连词啊！为什么词典上会说它是副词？

Answer 1

好像跟你的理解刚好相反,下面的句子是《简明英汉词典》的例句,你参考一下吧：
adv.
而且,还有
I don't want to go; besides,I'm too tired.
我不想去,再说我也太累了.
prep.
(表示排斥)除…之外(还有)
He had other people to take care of besides me.
除了我以外,他还需要照料其他人.
还有一个《新牛津英汉双解大词典 》的：
besides
preposition
in addition to; apart from
除…以外（还）；除…以外（不再）
I have no other family besides my parents.
除了父母,我再没有别的亲人.
besides being a player,he was my friend.
他除了是个运动员,还是我的朋友.
adverb
in addition; as well
此外（还）；而且,也
I'm capable of doing the work,and a lot more besides.
我有能力做这工作,除此之外,还可以干更多的事.
■[sentence adverb]used to introduce an additional idea or explanation
而且（用以补充一个想法或解释）
I had no time to warn you.Besides,I wasn't sure.
我没时间提醒你.而且,我也不太确定.