What part of speech is know?

Answer 1

The word know can be a noun or a verb depending on the context. For instance saying "I know what to do." then it is a verb. But if you say something like "He is in the know." then it is a noun.

Answer 2

"Knowing" is the present tense participle of the verb "know". Like other present participles, it can be used in a sentence alone or with other words as an adjective or a noun or as the beginning word of a noun or adjective phrase.

Answer 3

Knew is a verb. It's the past tense of know.

Answer 4

The word 'knew' is the past tense of the verb 'to know' (knows, knowing, known, knew). The noun form for the verb to know is knower, one who knows; and the gerund (verbal noun) knowing.