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Inflections

Inflection is the name for the extra letter or letters added to nouns, verbs and adjectives in their different grammatical forms. Nouns are inflected in the plural, verbs are inflected in the various tenses, and adjectives are inflected in the comparative/superlative. Here are some of the most important inflection rules:

Original word type Inflection Rule Examples
Words ending with a sibilant: -s/-ss/-sh/-ch/x.




Words ending with the letter -o.
Add -es in the plural noun or 3rd person singular verb. bus → buses (n) / busses (v)
miss → misses
wish → wishes
watch → watches
fox → foxes
potato → potatoes
do → does
Words ending consonant -  y. Change the -y to ie before the ending -s. party → parties
study → studies
cry → cries
Words ending consonant -  y. Change the -y to i before the endings -ed/-er/-est/-ly. try → tried
happy → happier
easy → easiest
Words ending consonant -  y. Do NOT change the -y before the ending -ing. carry → carrying
try → trying
Words ending vowel -  y. Do NOT change the -y. buy → buys
play → played
Words ending with the letters -ie. Change the -ie to a - y before the ending -ing. die → dying
lie → lying
Verbs ending consonant -e. Omit the -e before the ending -ing. ride → riding
love → loving
write → writing
provide → providing
One-syllable words ending consonant-vowel-consonant.



Two or more syllable words ending  consonant-vowel-consonant that are stressed on the last syllable.
Double the last consonant before the endings -ing/-ed/-er/-est. hit → hitting
stop → stopped
wet → wetter
fat → fattest
begin → beginning
prefer → preferred
Two or more syllable words ending  consonant-vowel-consonant that are stressed on the first syllable. Do NOT double the last consonant before the endings -ing/-ed/-er/-est. happen → happening
visit → visited

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