Etiquettes
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 of the word neurosis is "neuroses".
The word etiquette is a noun. The plural form is etiquettes.
The nouns 'work' and 'etiquette' are both uncountable nouns. The term 'work etiquette' is an abstract noun, a term for a concept, an uncountable noun.Note: The plural form 'works' is a count noun, a word for something produced; for example the artist's best work or all of the author's works.
The word etiquette is a noun. Nouns don't have tenses. Nouns are singular or plural, common or proper, concrete or abstract. Verbs have tenses, there is no verb form for etiquette. The noun etiquette is a singular, common, abstract noun.
The plural form for the demonstrative pronoun this is these.
The plural form of the word inferno is infernos.
The plural form is ranches.
There is no plural word for if.
There is no plural form for the word, countries. This word itself is a plural.
The plural form is data.
The plural form of the word "baby" is "babies."
The plural form for the word 'pioneer' is pioneers.
The plural form of the word "pharynx" is "pharynges."