English Grammar with Kudjo. Part 4. Понятная и забавная грамматика для детей и взрослых. Larisa Lubimova
fungi, a nucleus – nuclei
– is to -es: a crisis – crises, an analysis – analyses, a diagnosis – diagnoses, a thesis – theses
– on to -a: a criterion – criteria, a phenomenon – phenomena
Compound nouns form their plural by adding -s/es:
to the second noun if the compound consists of two nouns: a backpack – backpacks
but with man or woman both parts take plural: a woman-doctor – women-doctors
to the noun if the compound consists of an adjective and a noun: a swimming pool – swimming pools
to the first noun if the compound consists of two nouns connected by a preposition or to the noun if the compound has only one noun: a brother-at-arms – brothers-at-arms
at the end of the compound if it does not include any nouns: a breakthrough – breakthroughs
There are nouns (mostly game-birds, wild animals and most kinds of fish) with a common singular and plural form: a deer – deer, a fish – fish, a sheep – sheep, a trout – trout, a salmon – salmon, a spacecraft – spacecraft, an aircraft – aircraft, a hovercraft – hovercraft, a means – means, a species – species
There are irregular nouns: a man – men, a woman – women, an ox – oxen, a goose – geese, a child – children, a tooth – teeth, a foot – feet, a mouse – mice, a louse – lice
EXERCISE 5
Change the nouns in brackets into the plural where possible:
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