ut 和however 都表示转折,但是,然而.最明显的区别就是however 是单独使用的,文中出现在一句话的结尾,一段话的开始,有逗号隔开.
比较：He used to be a good driver,however,he had a traffic accident yesterday.
He used to be a good driver,but he had a traffic accident yesterday.
He used to be a good driver but he had a traffic accident yesterday.
另外but 还表示除.之外,常用结构have no choice but to do除了.之外别无选择
but 还可以直接接副词.But now,I have no choice but to forget out of my willingness.
可如今,我只能逞强自己选择遗忘.而however不可以.
however除了表示转折以外,还可接其他词,如however much/many/far/often/long等,此时表示无论多...可以相应换成no matter how +much/many/far/often/long
比较People are going to take however much you're willing to give.人永远不会嫌自己拿得多.
In my opinion,parents do not owe their children an inheritance,no matter how much money they have.以我个人的观点,家长们不欠儿女们一份遗产,不论他们多么有钱.
如果还有其他的问题的话,可以去小马过河问问那里专业的英语老师,