If the marked comma is separating two complete but related sentences, replace the comma with a semicolon. If the second half of your sentence begins with "then," add "and" before "then." In this case, use a comma to separate the two groups of words.
- Instead of: She did not create these charts, this is not her team's project.
- Consider: She did not create these charts; this is not her team's project.
- Instead of: She wrote up the idea, then she got a patent.
- Consider: She wrote up the idea, and then she got a patent.
