Unfortunately, I couldn't make it. Unfortunately I couldn't make it. For example, I have seen words like although,notably,in the ensuing events, and all of them can receive a comma after.
The words are not the same kinds of words, so the comma rules are different. " The word "although" is a subordinate conjunction. There is no reason to put a comma after it.
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The words are not the same kinds of words, so the comma rules are different. There would not be a comma after "although." The word "although" is a subordinate conjunction. There is no reason to put a comma after it. The other words are introductory in nature and would have a comma after them.