No, the object of a preposition is a noun, a pronoun, or a gerund (the present participle of a verb). Examples:
Noun: We had fun at the party.
Pronoun: He brought flowers for her.
Gerund: They cleared the room for dancing.
No. Would be is a conditional mood of the verb "to be" (as is will be/can be/could be). It is not a preposition.
The word "on" could be a preposition, as in "they went on an expedition" but would be an adverb in the example "unable to turn back, they went on" (no object). In any case, went is NOT a preposition,: it is a verb, the irregular past tense of the verb "to go" (past participle gone).
No, it is not a preposition. In 'accepted an award' you have a past tense verb and its object. There is no preposition or prepositional phrase.
Beside is a preposition. Stood is the past tense of stand.
Knew is not a preposition. It's a verb (past tense of know).
No. The word "made" is the past tense and past participle of the verb (to make) and is not part of the prepositional phrase beginning with "of." * In the construction "what are little girls made of" the object of the preposition is what.
"Covered" is not a preposition. It is a past tense verb or an adjective.
"In" is a preposition, it doesn't have a past tense.
No, "blew" is not a preposition. It is a past tense form of the verb "blow."
No. The word "at" is a preposition. Some archaic constructions (go at, have at) omit the object of the preposition.
"Or" is a preposition, not a verb, so it does not have a past tense.
No, it is not a preposition. Adapted is a past tense verb form.