Which word is a preposition? i am going to the store. am i the to

The preposition is 'I' I think. I could be wrong.

I believe to is the preposition  :)

Common Preposition list: 
above across after at around beneath behind below beside between by down during for from in inside  onto of off on out through to under up with 

Hope this was helpful :)

                                     

What r the