It's hard to figure out what "it" is in your question. Are you referring to the subject of a sentence that has two nouns connected by the word and, as in Bob and Ray are playing baseball? In that case, the subject, Bob and Ray, is plural and takes a plural verb. But when the two nouns connected by and act as a unit, they take a singular verb, as in Ham and eggs is my favorite breakfast and Pork and beans tastes great.
it is the first sentence and states part of the question
It is a grammatical unit of one or more words that expresses a statement, opinion or decision
we don't know what you are talking about.
How to use the word in a sentence.
Radiation should not be capitalized unless it appears at the beginning of a sentence or is part of a proper noun, like "Radiation Therapy Unit."
Did you know that the chloroplast is part of a plant cell which contains chlorophyll.
The word "month" is a noun in the sentence. It is used to identify and refer to a particular unit of time.
the square unit of....!
i only know 3 gaudy, gla, and heed
The word "how" functions as a subordinating conjunction in the sentence "I know how to write." It introduces a subordinate clause that provides more information about the verb "know."
The term for knowing a word's part of speech in order to appropriately use it in a sentence is "word-usage."
A phrase is a group of words that functions as a unit in a sentence but does not contain a subject and a verb. It can act as a noun, adjective, or adverb within a sentence.