| A | B |
| Punctuate Compound Sentence | ,+ FANBOYS |
| Punctuate Compound Subjects | no punctuation |
| used to join two related ideas | and |
| used with two negative ideas | nor |
| used to show contrast between two ideas | but |
| used to join two different choices | or |
| used for contrast (like but) | yet |
| used for cause & effect | so |
| Does the comma go after the FANBOYS? | no |
| Does the comma go before the FANBOYS? | yes |
| It was raining, ___ we still had fun. | but |
| I could not go into the store,___ it was closed. | for |
| She was quite sleepy, ___ she continued to study | yet |
| Tomorrow it might be cloudy, ___ it might be sunny. | but |
| It was cold outside, ___ we stayed inside. | so |
| F | for |
| A | and |
| N | nor |
| B | but |
| O | or |
| Y | yet |
| S | so |