Plural forms

hat – hats bus – buses glass - glasses boy – boys box – boxes bench - benches country – countries brush – brushes match - matches

hero – heroes но: piano - pianos potato – potatoes photo - photos volcano – volcanoes stereo - stereos tomato – tomatoes kilo - kilos echo – echoes radio - radios

thief – thieves wife – wives но: roof – roofs proof - proofs leaf – leaves shelf – shelves belief – beliefs serf - serfs knife – knives wolf – wolves chief – chiefs safe - safes life – lives half – halves gulf – gulfs cliff - cliffs

man – men goose – geese louse - lice woman – women mouse – mice brother - brethren foot – feet ox - oxen tooth – teeth child - children

deer – deer fish – fish (fishes = kinds of fish) sheep – sheep fruit – fruit (fruits = kinds of fruit) swine - swine

basis – bases datum – data crisis – crises radius – radii thesis – theses formula – formulae/formulas criterion – criteria memorandum – phenomenon – phenomena memoranda/memorandums

means a means of transport – various means of transport series a television series – many television series species a species of birds – different species of birds crossroads this crossroads – these crossroads works (factory) a gas works – two gas works

Только в единственном числе

linen progress money sugar behaviour furniture business scenery bread evidence knowledge information wood beef research advice trouble weather macaroni trouble luggage accommodation sand salt music baggage equipment damage chaos spaghetti permission traffic work justice luck rubbish hair food machinery jewellery

Только в единственном числе

news, mumps, measles, economics, mathematics, physics, statistics billiards, dominoes, darts, bowls gymnastics, athletics politics, tactics, optics, ethics

Только во множественном числе

sights riches savings earnings lodgings clothes goods people outskirts stairs poultry trousers sweets police slums scissors cattle jeans arms contents wages spectacles congratulations tights

Как в единственном, так и во множественном числе

family crowd congress company clergy team jury government crew gentry group public committee board staff army audience delegation

Составные существительные

brother-in-law - brothers-in law forget-me not - forget-me-nots merry-go-round - merry-go-rounds woman-teacher - women-teachers