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Nouns of Greek and Latin Origin
Suffix change | Pronunciation | Example |
-is → -es | [ıs → i:z] | analysis – analyses (анализ; грам. разбор) axis – axes (ось, опора) basis – bases (основание, базис) crisis – crises (кризис) diagnosis – diagnoses (диагноз) hypothesis – hypotheses (гипотеза, предположение) oasis – oases (оазис) synopsis – synopses (конспект, краткий обзор) thesis – theses (тезис, диссертация) |
-um → -a | [əm → ə] | agendum – agenda (повестка дня) bacterium – bacteria (бактерия) datum – data (данная величина) erratum – errata (опечатка, описка) medium – media (средство, способ) memorandum – memoranda (дип. нота) stratum – strata (пласт, слой) |
-ix (-ex) → -ices | [ıks → ısi:z] | appendix – appendices (добавление, приложение) - appendixes (мед. термин -аппендикс) index – indices (показатель степени; коэффициент) – indexes (алфавитный указатель, каталог) |
-a → -ae | [ə → i:] | formula – formulae (мат. - уравнение) - formulas (формула, формулировка) vertebra – vertebrae or vertebras (позвонок) antenna – antennae (зоол. щупальце, усик) – antennas (теле/радиоантенна) |
-us → -i | [əs → aı] | cactus – cacti or cactuses (кактус) nucleus – nuclei (ядро) radius – radii (радиус) stimulus – stimuli (стимул, побудитель) terminus – termini (конечная станция, вокзал) genius – geniuses (гений) /genii (дух, джин) But: genus – genera (биол. род, вид, сорт) |
-on → -a | [ən → ə] | criterion – criteria (критерий) phenomenon – phenomena (явление) |
IRREGULAR PLURALS
For historical reasons certain nouns form their plural differently.
1. Seven nouns form their plurals by changing the root vowel(s):
man - men
woman - women
tooth - teeth
foot – feet
goose - geese
mouse - mice
louse - lice
2. Two nouns have -en to mark the plural:
ox - oxen, child - children.
Note: Brother has two plural forms: brothers and brethren ( old-fashioned, a religious term). Let us pray, brethren.
3. Some nouns have the same form in the singular and plural. Here belong:
A) some animal names:
a sheep-sheep
a swine-swine
a deer - deer
a grouse - grouse
a fish - fish
a trout - trout
a salmon - salmon
This sheep looks small. All those sheep are good.
My gold fish has died. There’re so many fish in the river, they splinter the paddles.
But: He studies the fishes of the Atlantic. She had a big collection of minerals, insects and fishes. (different individuals or species of fish).
B) nationality names, ending in -ese, -ss:
a Chinese –the Chinese
a Japanese- the Japanese
a Swiss – the Swiss,
a Portuguese – the Portuguese, etc.
We met a Japanese. The Japanese are clever and creative people.
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Spelling rules | | | With other nouns (denoting inanimate objects or abstract notions) |