I'm not sure if I can generalize this type of construct, but is there a grammar term for single words surrounded by commas? Consider the following examples:
- Let's assume you are given a length of time, say, 10 minutes.
- Tristan was, unsurprisingly, late to the meeting.
- The plain-looking building was, well, plain.
Are these known as appositives?
parenthesisany construct between commas (or dashes, or brackets) that can be removed from the sentence without disrupting it. For instance the mayor, who was a real jerk, hanged my neighbour can be rewritten it as the mayor hanged my neighbour, preserving the general sense of the sentence, although removing some information. In that sense, when you have it at the end of the sentence the rule still holds: it's between a comma and a full stop, and you can remove it. Same for subordinates. – nico Mar 29 '11 at 6:37