The form 'saltworks' functions as a singular or a plural noun. Example:
singular: Jim is applying for a job at the saltworks.
plural: We have invested in a number of saltworks.
The singular version of everybody Is "everyone."
pixaxe is the singular version, pickaxes is the plural version.
Singular. "Porpoises" is the pural version of porpoise.
El libro is the singular version.
Well there is no such thing
The singular form is also "your" - although the archaic version would be "thy".
ounce is the singular version and ounces is plural.
The singular version of criteria is "criterion." It is considered irregular because it does not simply add an "-s" or "-es" to form the singular, like most nouns in English. Instead, it follows a different spelling rule for pluralization.
Feminine. You can tell because "la" is the singular, feminine version of "the" ('Las' is the plural). The singular, masculine version of "the" is "el" ('Los' is the plural).
To say, "How old are you?" in French, you would use the expression, "Quel âge as-tu?" or "Quel âge avez-vous?" The first expression is the the singular, informal version, and the second expression is the singular, formal/plural version.
The word teeth is the plural version of the word tooth.
"Sonidos" means "sounds". The singular version would be "Sonido".