A participial adjective is a present or past participle that is used to modify a noun.
The past participle form of "sing" is "sung."
preached
chided (past tense) and chidden (past participal)
The simple past tense is chose. The past participle is chosen.
Yes, "included" is a past participle of the verb "include," which can function as part of a prepositional phrase in a sentence.
No, it is not. It is the past tense and past participle of the verb to purchase. It can be a verb form, a participial, or an adjective (bought, paid for).
No, it is not. Frustrated is the past tense and past participle of the verb (to frustrate) and may be a verb form, participial, or adjective.
No, "lingered" is not an adverb. It is a verb that means to stay in a place longer than necessary. However, the adverb form of "lingered" would be "lingeringly," which describes the manner in which someone lingers.
No. Wished is a past tense verb, and a past participle(to wish). But it could form a participial phrase to function as an adverb.
No, it is not. It is the past tense and past participle of the verb to insert. It can be a verb form, a participial, or an adjective (e.g. inserted edits).
It can be (spilled milk). It is the past tense and past participle of the verb (to spill) and may be a verb, participial, or adjective.