Coats of mail. "Of mail" is a prepositional phrase, and therefore is left alone.
"Coat" is a singular noun. It refers to a single garment that is worn over other clothing for warmth or protection. If you have more than one of these garments, you would refer to them as "coats," which is the plural form of the word.
There is no plural form for the word, countries. This word itself is a plural.
The plural of diary is diaries.
The plural form of the word gelato is gelati.
The plural form of the word 'deed' is 'deeds'.
The plural form for the demonstrative pronoun this is these.
The plural form of the word inferno is infernos.
"Coat" is a singular noun. It refers to a single garment that is worn over other clothing for warmth or protection. If you have more than one of these garments, you would refer to them as "coats," which is the plural form of the word.
The plural form is ranches.
There is no plural form for the word, countries. This word itself is a plural.
There is no plural word for if.
The noun 'mail' is a singular, uncountable (mass) noun; a type of aggregate noun, a word representing an indefinite number of elements or parts.The word 'mail' is also a verb: mail, mails, mailing, mailed.
The plural form is data.
The word children is the plural form for the singular noun child. The form children's is the plural possessive form. For plural nouns that do not end with -s, the possessive form does add the -'s to the end of the word.
The plural form for the word 'pioneer' is pioneers.
The plural form of the word "baby" is "babies."
The plural form of the word "pharynx" is "pharynges."