"Could" is part of a special group of verbs known as modal auxiliary verbs. Some other modal verbs are may/might, will/would, shall/should.
it depends what word it is it could be any part of speech depending on the sentence
The part of speech that the word my is used as is an adjective.
A suffix changes a word's part of speech. For example, the word 'happy' is an adjective. But when you add a suffix, which is an ending, it can change the part of speech. Happily is an adverb. Happiness is a noun.
for
The word power is a noun. The plural form is powers.
it depends what word it is it could be any part of speech depending on the sentence
The word binding could belong to more than one part of speech. It could be a participle or a noun.
The word could've is a contraction. It is the contracted form of the words could and have.
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.