The word 'the' has no plural. The word 'the' is a definite article, used to indicate that the noun that follows it is a specific person or thing. When more than one person or thing is spoken of, either no article or adjective is used (The car crashed. to Cars crashed.); the plural demonstrative pronouns are used (These cars... or Those cars...); or a possessive noun or pronoun is used (Their cars crashed. or Joe and Jane's cars crashed.)
The word crises is a plural word; it is the plural form of the word crisis.
There is no plural word for if.
The plural form for the demonstrative pronoun this is these.
A non-plural word, a word (noun or pronoun) that is not plural is singular, a word for just one.
The plural word of delay is delays.
the plural word is comedones
No it's a singular word. A plural word would be "have".
Leukocytes is the plural of leukocyte
The plural of "classification" is "classifications."
The plural noun is raisins.
The correct plural for the word "wolf" is "wolves."
The plural of the word brush is brushes. As in "she brushes her hair".