NOUNS AND DETERMINERS
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  • Irregular Plurals
  • Collective and Uncountable Nouns. Partitives
  • Pluralia Tantum
  • Types of Determiners
  • Use of "A"/"An"
  • Particular/Specific VS General Use of "The"
  • Ways of Generalising. "The" depending on the context
  • Place Names
  • Special Rules and Exceptions
  • Quantifiers
  • More Exercises
    • Exercise 10
    • Exercise 11
    • Exercise 12
    • Exercise 13
    • Exercise 14

IRREGULAR PLURALS


Some nouns form their plural irregularly:
child – children
goose – geese
mouse – mice
ox – oxen
tooth – teeth
foot – feet
louse – lice
man – men
person – people
woman – women


Some nouns remain unchanged in the plural:
craft – craft
fish – fish
squid – squid
spacecraft – spacecraft
cod – cod
Japanese – Japanese
salmon – salmon
species – species
trout – trout
deer – deer
means – means
sheep – sheep
series – series
Exercise 1

Some nouns are only plural:
a) arms (weapons), belongings, cattle, clothes, congratulations, earnings, goods, groceries, greens (vegetables), lodgings, oats, odds (chances), outskirts, people, police, premises (building), regards, remains, riches, savings, surroundings, thanks, etc
b) garments, tools and instruments consisting of two ports: binoculars, compasses, glasses, jeans, pants, pliers, pyjamas, scales, scissors, spectacles, trousers, etc

Here is a list of most common foreign plurals. These are an important part of specialist terminology.
addendum – addenda
alga – algae
analysis – analyses
antenna – antennae
appendix – appendices
automaton – automata
axis – axes
bacillus – bacilli
bacterium – bacteria
basis – bases
cactus – cactuses, cacti
candelabrum – candelabra
cargo – cargos or cargoes
crisis – crises
criterion – criteria
curriculum – curricula
datum (rarely used) – data
diagnosis – diagnoses
erratum – errata
focus – foci
formula – formulas
fungus – fungi
gymnasium – gymnasia
larva – larvae
locus –  loci
matrix – matrices
maximum – maximums
medium – media/mediums
millennium – millennia
minimum – minimums, sometimes minima
nebula – nebulas or nebulae
oasis – oases
paparazzo – paparazzi
paralysis – paralyses
parenthesis – parentheses
phenomenon – phenomena
podium – podiums, sometimes podia
radius – radii or radiuses
referendum – referendums or referenda
stimulus – stimuli
stratum – strata
syllabus – syllabuses, sometimes syllabi
symposium – symposiums or symposia
synopsis – synopses
synthesis – syntheses
terminus – termini or terminuses
thesis – theses
vertebra – vertebrae, vertebras
For more see Plurals of foreign words in English.

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