We use claws7 tagging software to analyze the part of speech of ‘over’. Claws7 is used in iWeb corpus so it is easy to also look for examples.
I go_VV0 over_RP the_AT bridge_NN1 ._. (if lexical verb before then 'over' is a particle, regardless if followed by a noun or prepositional phrase) I go_VV0 over_RP for_IF lunch_NN1 . I go_VV0 over_RP . (But if the verb 'BE' precedes 'over', and it is followed by a noun phrase, then it is a preposition.) I am_VBM over_II the_AT bridge_NN1 . I sit_VV0 over_RP the_AT bridge_NN1 . I am_VBM over_RG 18_MC . ('over' becomes a degree adverb when followed by a number or time.) I 'm_VBM over_RG 18_MC , so I can drive_VVI over_RP .
My_APPGE car_NN1 is_VBZ over_RL21 here_RL22 ._.
1 OVER (II) 5556774
‘over’ is usually a preposition which means it is followed by a noun phrase.
2 OVER (RG) 2900750
‘over’ is next most common as a degree adverb. Here it is usually followed by a number and noun of time.
1 FOR OVER A YEAR 25970
3 OVER (RP) 2142008
4 OVER (RL21) 56404 B1 OVER HERE
2 part locative adverb