commas can also completely change the meaning of a sentence if they're not used correctly. Watch this video to explore how commas are used. When you're writing a list, use commas between each item ...

Language evolves over time, and many phrases that once had clear meanings have taken on completely different definitions. Cultural shifts, technology, and changing social norms have transformed ...

If the clause is essential to the meaning of the sentence, it takes that without commas: the entrance that we came through. If the clause can be omitted without changing meaning, it takes which and ...