Let's break it down. The rule, per Purdue OWL, is that you should not put a comma between the two verbs or verb phrases in a compound predicate. "John" is the subject of the sentence. "Ate a slice ...

Last week, we started discussing the differences between a phrase, clause and a sentence. We defined a phrase as a group of words without a subject and a predicate, though standing together to form a ...

Secretary of State Mike Pompeo, it seems, is a little obsessive about commas. According to press reports, he’s been sending out directives to staff that they should follow certain strict guidelines.