GRAMMAR PLURALS Singular Plural Examples General rule + s file → files, computer → computers Words ending in -ch, -s, -ss, -x, -z, -o + es box → boxes, virus → viruses Abbreviations ending in or words with a vowel before the final -o -o + s video → videos Words with a consonant before the final -y + ies copy → copies Most words ending in and -f -fe + ves half → halves, but proof → proofs Some irregular plurals - en + -en ox → oxen; child → children - → oo ee foot → feet; goose → geese - → a e man, woman → men, women - → ouse ice mouse → mice, louse → lice Words with a Greek origin ending in or a Latin origin ending in -on -um - a phenomenon → phenomena, medium → media Words with a Greek origin ending in -ma - mata schema → schemata Words with a Latin origin ending in -a - ae formula → formulae Words with a Latin origin ending in -us - i fungus → fungi Words with a Latin origin ending in -is - es axis → axes Word with a Latin origin ending in -x - / ces ges matrix → matrices Invariable plurals - sheep → sheep, fish → fish For some words there are sometimes two forms, but the English plural is generally used only for a narrow definition of the term. A typical example is mouse → mice (= the animal) and → mouses (= a pointing device for a computer 17 Write the plural of the given words. Process .............................................................. Phenomenon .............................................. Stimulus ........................................................... Datum ................................................................ Matrix ................................................................. Disc ....................................................................... Compendium .............................................. Formula ............................................................ Mouse ................................................................ . Wiki ....................................................................... . Analysis ............................................................. . Virus ..................................................................... . Mainframe ...................................................... . Motherboard ............................................... . Input .................................................................... . Code .................................................................... . Schema ............................................................. . Axis ....................................................................... Database ......................................................... Network ........................................................... Screen ................................................................ 1. 2. 3. 4. 5. 6. 7. 8. 9. 10 11 12 13 14 15 16 17 18 19. 20. 21. 18 Make the plurals of these sentences. I bought an infrared mouse for my computer. ................................................. The value on the X-axis generally indicate time. ................................................. My maths teacher made me learn a difficult formula. ................................................. I am working on a new database. ................................................. I’m interested in a natural phenomenon. ................................................. 1. 2. 3. 4. 5.