It could be a past tense verb ("They adopted a girl"), or it could be a past participle used as an adjective ("This is my adopted son"). We can't tell which without seeing how it's used in a sentence.
Adopted can be used as a verb and an adjective. Verb: That family adopted three children. Adjective: an adopted child
Adopt is a verb. Example: The adopted three girls.
The part of speech that the word my is used as is an adjective.
The part of speech for this particular word is a noun.
The part of speech for the word civilian is English grammar.
The part of speech for the word diplomacy is a noun.
H is a letter, not a word. To be a part of speech, it needs to be a word.
The part of speech for the word "boulevard" is a noun.
The word speech is a noun.
The part of speech for this particular word is a noun.
The word speech is a noun.
The word speech is a noun.