1. "Thus" as a Conjunctive Adverb:
* When "thus" introduces a clause that shows a consequence or result, it acts as a conjunctive adverb.
* In this case, a comma is usually placed before "thus" to separate the clauses.
Example:
* "The rain was heavy, thus delaying our journey."
2. "Thus" as an Adverb:
* When "thus" modifies a verb or adjective, it acts as a regular adverb and doesn't require a comma.
Example:
* "He spoke thus to the crowd."
3. "Thus" in a Series:
* If "thus" appears within a series, follow the standard rules for commas in lists.
Example:
* "He prepared the ingredients, chopped them carefully, and thus created a delicious meal."
In summary:
* Commas before "thus" are generally used when it introduces a clause showing consequence or result.
* Commas are not used when "thus" is a regular adverb or appears within a series.
Always consider the context and the intended meaning to decide whether a comma is needed.