Adverb 不可像 conjunction 般直接將兩句子子連接,需加 and 或開新句。
即
He was not there. Therefore, he was not the murderer.
He was not there. Therefore he was not the murderer.
He was not there, and therefore he was not the murderer.
He was not there; therefore, he was not the murderer.
為正確
但為何
He was not there, therefore he was not the murderer
也正確? 這看似 conjunction
另外,however / therefore 也是 adverb ,為個 however 後要加 comma。Adverb 則不用?