Tham khảo tài liệu 'oxford learner's grammar 10', ngoại ngữ, ngữ pháp tiếng anh phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Irregular noun plurals 281 Introduction Most countable nouns have a regular plural in -s es. hand - hands date - dates bus - buses lor details of spelling and pronunciation 276. For the plural of compound nouns 131B. For the use of plural norms 131C. Some nouns have an irregular plural. num - men life - lines stimulus - stimuli Irregular plurals are formed in a number of different ways for example by changing a vowel or consonant sound or by adding an unusual ending. 282 Vowel and consonant changes A Vowel changes Some plurals are formed by changing the vowel sound. foot feet goose - geese man - men mouse - mice tooth - teeth womanl womdnl - women winnn NOTE We also use men and women in words like t rench men and sportswomen. B The ending -en There is an old plural form -en which has survived in these two nouns child J aild children tjddran ox - oxen c Consonant changes With some nouns we change to V and add-i Z-es. calf - values half- halves knife - knives leaf - leaves life- lives loaf- loaves shelf- shelves thief- thieves wife - wives wolf - wolves Some nouns ending in or fe are regular beliefs chiefs cliffs safes. A few can have cither form . scarf - scarfs scarves. D Voicing Some nouns ending in th have a regular written plural but there are two possible pronunciations. path pu 0 - paths pct Os or pa ôz 38tì 283 Nouns which do not change in the plural The last two sounds of paths are often voiced. Other examples are baths mouths truths and youths young people . Some plurals in ths are regular . births deaths months. These are pronounced with Os . there is also voicing in the last syllable of houses. house háííS - houses haoziz E Penny pence and pennies When we are talking about an amount of money we use pence as the plural of penny. Seventy-five pence please. Pennies are individual penny coins. J found an old tin with a lol of pennies in it. F Person persons and people Person has two plurals persons and people. Authorized persons only may enter. .