Semantics of the Comma
In many cases commas are optional with rules like the Oxford comma that attempt to bring consistency to the ambiguity. Yet there are cases where commas change the meaning of the sentence. For example, consider removing the comma from the following sentence:
“Let’s eat, Grandma!”
Conjunctions and Adjectives
The word “only” can function as a conjunction or as an adjective. Here’s a game you can play: place the word “only” anywhere in this sentence and see how it changes the meaning:
She told the Paladin that she kills Goblins.