When there is more than one of something, it is called a plural.
To turn a word into a plural, we usually need to add an -s or -es.
For many words, we can just add an -s.
mug - mugs
boot - boots
coin - coins
However, for words ending in s, ch, sh, ss, x or z, we need to add -es.
fox - foxes
brush - brushes
watch - watches
Let's have a go at turning some words into plurals.