Here's how to tell:
Conjunction:
* Connecting words or clauses: "So" connects two clauses, showing a cause and effect relationship.
* Example: *It was raining, so we stayed inside.*
* Introducing a consequence: "So" introduces a consequence or result.
* Example: *I studied hard, so I did well on the test.*
Adverb:
* Expressing degree or extent: "So" modifies an adjective or adverb.
* Example: *The movie was so good.*
* Expressing emphasis: "So" emphasizes a statement.
* Example: *So, how was your day?*
To determine if "so" is a conjunction or an adverb, look at how it's being used in the sentence.