"Beer" is a mass noun, and therefore can not be usually be pluralised - like sheep and water. You can't say sheeps. When the beer is in individual glasses or bottles you can say beers, this being the accepted plural for glasses or bottles of beer. When refering to different types of beer you can also say I like strong beers.
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."
The plural form of vow is vows.
There is no 'plural form' of the word 'minute'. The word is both singular and plural.
The plural form for the noun valley is valleys.