Singular to Plural
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Some words have the same spelling in both singular and plural forms.
-   Advice = singular
-   Advice = plural

-   Baggage = singular
-   Baggage = plural
-    Series = singular
-    Series= plural

-    Information
-    Information
-   Sheep = singular
-   Sheep = plural

-   Aircraft = singular
​-   Aircraft = plural
However -  Fish = singular and plural, if the fish are of the same species
                    Fish = fishes if referring to more than one species of fish
To make most word plural, add an 's'.
  • Keys
  • Socks
  • Bananas
  • Boats
Add 'es' to words ending in s, x, z, ch, sh - or 'o' when preceded by a consonant.
-   Address = addresses
-   Branch = branches
-   Bus = buses 
​-   Potato = potatoes
-   Beach = beaches
-   Brush = brushes
-   Buzz = buzzes 
​-   Tomato = tomatoes
-   Six = sixes
-   Fox = foxes
​-   Glass = glasses  
Words that end in an 'f' always change the 'f' to a 'v' to become plural:
  • Knife = knives
  • Life = lives
  • Half = halves
  • Wife = wives
-   Reindeer = reindeer or
​                         reindeers
-   Shrimp = shrimp or shrimps
-   Whale = wales or whales
-   Trout = trout or trouts
-   Roe = roe or roes
-   Mackeral = mackeral or mackerals
-   Buck = buck or bucks
-   Boar = boar or boars
-   Quail = quail or quails
-   Buffalo = buffaloes
-   Echo = echoes
​-   Mosquito = mosquitoes
-   Potato = potatoes
-   Tomato = tomatoes
-   Mango = mangoes
-   Volcano = volcanoes
-   Torpedo = torpedoes
​-   Veto = vetoes
-   City = cities
-   Country = countries
-   Sky = skies
-   Cry = cries
-   Cherry = cherries
​-   Spy = spies
-   Story = stories
-   Theory = theories
​-   Strawberry = strawberries
-   Calf = calves
-   Knife = knives
​-   Leaf = leaves
-   Half = halves
-   Thief = thieves
-   Wolf = wolves
-   Shelf = shelves
-   Wife = wives
-   Life = lives
-   Bay = bays
-   Boy = boys
​-   Guy = guys 
-   Donkey = donkeys
-   Monkey = monkeys
-   Ray = rays
-   Journey = journeys
-   Chimney = chimneys
​-   Toy = toys
When 'y' is preceded by a consonant, change the 'y' to an 'i' and add 'es'.
  • Party = parties
  • Story = stories
  • Try = Tries
  • Army = armies
  • Bunny = bunnies
-   Belief - beliefs
-   Bluff = bluffs
​-   Safe = safes
-   Giraffe = giraffes
-   Cliff = cliffs
-   Chef = chefs
-   Handcuff = handcuffs
-   Reef = reefs
​-   Chief = Chiefs
-   Criterion = criteria
-   Dormouse = dormice
-   Mouse = mice
-   Tooth = teeth
-   Foot = feet
​-   Goose = geese
-   Louse = lice
-   Woman = women
-   Man = men
-   Oasis = oases
-   Parenthesis = parentheses
​-   Thesis = theses
-   Basis = bases
-   Analysis = analyses
​-   Crisis = crises
-   Ellipsis = ellipses
-   Diagnosis = diagnoses
-   Axis = axes
-   Cupful = cupfuls
-   Go-between = go-betweens
-   Brother-in-law = brothers-in-
​                                   law
-   Man-of-war = men-of-war
-   Passerby = passersby
​-   Mix-up = mix-ups
-   Handful = handfuls
-   Bystander = bystanders
​-   Mouthful = mouthfuls
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