I don't have the English grammar vocabulary to refer to this properly, so I'll just use examples:
"He was, after all, the youngest."
"It was cold, though, and she wasn't wearing a parka."
Am I right in having those two commas in the sentences? Are there particular instances in which people tend to do this but shouldn't?
"He was, after all, the youngest."
"It was cold, though, and she wasn't wearing a parka."
Am I right in having those two commas in the sentences? Are there particular instances in which people tend to do this but shouldn't?