Question

Why preposition to cannot be followed by a past form of a verb?

Answer 1

Prepositions are words which link nouns, pronouns and phrases to other words in a sentence

Prepositions usually describe the position of something, the time when something happens and the way in which something is done,
although the prepositions "of", "to" and "for" have some separate functions.

it is not followed by past form of verb because because it according to noun