We add -s to words for two reasons:
Spelling Rule Just add -s to the end of the word, for example:
Exceptions
If the word ends in:
do this:
and add:
For example:
-ch -s -sh -x -z
nothing
-es
church > churches mass > masses brush > brushes fax > faxes box > boxes chintz > chintzes
-f -fe
remove the -f or -fe
-ves
wife > wives calf > calves
except: beliefs, cliffs, chiefs, dwarfs, griefs, gulfs, proofs, roofs
consonant + -y
remove the -y
-ies
spy > spies baby > babies
Note: words that end in -o normally just add s, except: buffalo > buffaloes cargoes (or cargos) domino > dominoes echo > echoes go > goes grotto > grottoes halo > haloes hero > heroes mango > mangoes mosquito > mosquitoes motto > mottoes (or mottos) potato > potatoes tomato > tomatoes tornado > tornadoes torpedo > torpedoes veto > vetoes volcano > volcanoes