着急的请教however的相关问题：
1，记得在element of style 上看到说，however 在某个时候不能用于句首，真有这样的时候么？我觉得ETS似乎不这么认为，但不肯定。
2， LONGMAN 上对however 作副词时的一个解释：used to say that it does not matter how big, good, serious etc something is because it will not change a situation in any way
＝ no matter how
这没问题，但请看紧接的两个例句：
You should report any incident, however serious or minor it is
.We'll have to finish the job, however long it takes.
这不是明显得run-on 句子么？ however 是副词，没有连词，逗号连接两个句子!
谢谢！ | 
