Prepositions and Conjunctions?

Question

How can you tell if a word is a subordinating conjuction or preposition if it is considered to be both?

Example: since

This is considered to be a preposition and subordinating conjunction. In a sentence, how would you know which one it is?

Thank You!

Thank you Bruce, but I'm still kind of confused. Is there any other way to explain it?

Answer 1

A subordinating conjunction introduces a subordinating clause, e.g., "Since I moved to Florida . . ."

A preposition introduces a prepositional phrase, e.g., "Since August . . ."

A clause will have a subject and predicate, but a phrase will only have a noun as object of the preposition.

If this or another answer here proves helpful in your research, you can encourage good answers by choosing one answer as the "best answer."

Cheers,
Bruce

Answer 2

i think it depends on the location
like if since was at the beginning of a sentence that would be subordinating