The term "had known" is the past perfect tense.
Had is an auxiliary verb. Known is the past participle of the verb know.
The word known is a verb. It is the past participle of the verb know.
The word known is a verb. It is the past participle of the verb know.
The action in a sentence is the part of speech known as a verb.
The part of speech for this particular word is a noun.
The part of speech that the word my is used as is an adjective.
The word private is an adjective. It describes something that is not publicly known.
The word 'should' is part of speech. It is a verb form which is known as modal verb.
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 diplomacy is a noun.
The part of speech for the word "boulevard" is a noun.
The part of speech for the word civilian is English grammar.
The word speech is a noun.