Irregular Plural Nouns

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Plural Nouns

We form most of the plural nouns by adding s at the end of the word.
Examples: 
book    books
bird      birds
cat         cats
desk      desks
friend   friends
We form the plural of nouns ending in chs, sh, x, z by adding es.
Example:
peach       peaches
glass         glasses
brush       brushes
box           boxes
buzz          buzzes
Some nouns ending on o just need s to form the plural and some others need es, and some others can use either s or es.
Example:
ghetto       ghettos       
kangaroo kangaroos
kilo            kilos
memo       memos
piano        pianos
solo           solos
radio         radios
studio       studios
tattoo       tattoos
video       videos
zoo            zoos
echo         echoes
hero         heroes
mango     mangoes
potato      potatoes
tomato     tomatoes
mosquito mosquitos/mosquitoes
tornado    tornados/tornadoes
volcano    volcanos/volcanoes
zero           zeros/zeroes

Irregular Plural Nouns

Some nouns have irregular plural forms. We must memorize them. 
Examples:
child      children
foot        feet
man       men
mouse   mice
tooth     teeth
woman women

For more infirmation, see the table below.

 Singular Nouns Plural Nouns
addendum
aircraft
alumnus
analysis
antenna
apex
appendix
axis
bacterium
bison
cactus
child
crisis
criterion
curriculum
datum
deer
diagnosis
dwarf
ellipsis
fish
focus
foot
formula
fungus
goose
half
hypothesis
vertebra
vortex
wife
wolf
woman
addenda
aircraft
alumni
analyses
antennae or antennas
apices or apexes
appendices or appendixes
axes
bacteria
bison
cacti or cactus or cactuses
children
crises
criteria or criterions
curricula or curriculums
data
deer or deers
diagnoses
dwarves or dwarfs
ellipses
fish or fishes
foci or focuses
feet or foot
formulae or formulas
fungi or funguses
goose
halves
hypotheses
vertabrae or vertabras
vortices or vortexes
wives
wolves
women


Plural Noun Exercises

Exercise I

Underline the correct form of the nouns in parentheses.
Example:
She is a beautiful (girl, girls).
  1. He is a good (father, fathers).
  2. The (book, books) are on the desk.
  3. The (boy, boys) go to school on (foot, feet).
  4. The (child, children) are in the playground.
  5. The only thing I found in the fridge is an (orange, oranges).
  6. How many (student, students) are there in your class?
  7. He is my (boyfriend, boyfriends).
  8. Is it your (blog, blogs)?
  9. The (house, houses) is for sale.
  10. The (leaf, leaves) turn yellow so quickly.
  11. The (bus, buses) are waiting for us.
  12. He is a handsome (man, men).
  13. The (salesman, salesmen) are in the meeting.
  14. My baby's got three (tooth, teeth).
  15. The plane was thirty thousand (foot, feet) above the ground.

Exercise II

Write the correct form of the nouns in parentheses.
Example:
I saw some .... on the tree. (bird)
I saw some  birds on the tree.

  1. The ......................is on the wall. (clock)
  2. Have you seen any .............. running into the kitchen? (mouse)
  3. It is an expensive .................... (house)
  4. The fishermen caught a lot of .............. last night. (fish)
  5. There are some ..................... in the kitchen. (knife)
  6. I like ................... I eat them a lot every day. (tomato)
  7. The music hall has got two .................... (piano)
  8. How many .................... have you got? (child)
  9. Look at the baby. He's got two .................. (tooth)
  10. A lot of new scientific ......................... have been made lately. (discovery)
  11. We must work together to prevent the .................. from spreading. (virus)
  12. How many ............... are there in one trillion? (zero)
  13. Some ...................... in Indonesia erupt almost every year. (volcano)
  14. Because we are in a cave, we can hear the ...................of our voices. (echo)
  15. There are so many kinds of ...................... in this world. (bacterium)

Answer

Exercise I

  1. He is a good (father, fathers).
  2. The (book, books) are on the desk.
  3. The (boy, boys) go to school on (foot, feet).
  4. The (child, children) are in the playground.
  5. The only thing I found in the fridge is an (orange, oranges).
  6. How many (student, students) are there in your class?
  7. He is my (boyfriend, boyfriends).
  8. Is it your (blog, blogs)?
  9. The (house, houses) is for sale.
  10. The (leaf, leaves) turn yellow so quickly.
  11. The (bus, buses) are waiting for us.
  12. He is a handsome (man, men).
  13. The (salesman, salesmen) are in the meeting.
  14. My baby's got three (tooth, teeth).
  15. The plane was thirty thousand (foot, feet) above the ground.

Exercise II

  1. clock
  2. mice
  3. house
  4. fish/fishes
  5. knives
  6. tomatoes
  7. pianos
  8. children
  9. teeth
  10. discoveries
  11. viruses
  12. zeros
  13. volcanos/volcanoes
  14. echos
  15. bacteria

















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