In Spanish, yes, there can be feminine endings on past participles. English does not have gender-specific endings on past participles.
"Sold" does not have any past participle; it is the past participle of "sell".
"Am" is the first person singular present indicative form of "to be", for which the past participle is "been". Fundamentally, only infinitive verbs have past participle's; therefore "am", which can not be a proper infinitive, does not have any past participle.
"Extent" is a noun, not a verb, and therefore does not have any past participle. The corresponding verb, "extend" has "extended" as its past participle.
"High" is an adjective, not a verb; therefore, it does not have any past participle form
It doesn't have any tenses as it is a noun.
Recite is a regular verb. The past participle of any regular verb can be made by adding "ed" to the end of the word. Recited is the past participle of recite.
Always is not a verb and does not have any participle forms.
"Am" is the first person singular present indicative form of "to be", for which the past participle is "been". Fundamentally, only infinitive verbs have past participle's; therefore "am", which can not be a proper infinitive, does not have any past participle.
Discrimination is a noun so doesn't have any tenses. The simple past and past participle of discriminate is discriminated.
Road is a noun and does not have any verb forms. Rode, however, is the past tense of ride. The past participle is ridden.
"More" is an adjective, adverb, or noun, not a verb, and therefore does not have any past participle.
The word "gathers" is a the third person singular present indicative form of the verb "gather". It is not any kind of participle or any past tense.