1. as far as the verbs ending in O are concerned, (only 2: goes, does) the reason is simply historical;
2. the rest of the ES have a phonetic explanation: the S would be unpronounceable (e.g. "watchs" is not possible, it has to become "watches").
It depends on the word. Most words ending in "th" simply add an "s" to form the plural (e.g., "mouths"), while a few words add "es" (e.g., "baths"). It's best to consult a dictionary if you are unsure about a specific word.
Add -s to most nouns. Add -es to nouns ending in s, x, z, ch, or sh. Change -y to -i and add -es for nouns ending in consonant + y. Change f or fe to v and add -es. Memorize irregular plural forms like children, mice, and teeth.
If a word ends in "s" and you want to make it plural, you typically add "es" to the end of the word. For example, "class" becomes "classes" in plural form.
You have to use es in a word when the second last letter is a vowel and if it is a consonant use s
Words ending with s, x, ch, sh, and z add 'es' to the end of the word to form the plural. Examples:class, classesbox, boxesmatch, matcheswish, wisheswaltz, waltzes
To form the plural of words ending in 's', you add '-es'. Princess, princesses.
s
just delete the d and add s
-s for composers.
You end it with an es. "Heroes".
No, you add -es instead of -s Example: bosses
You just add s to back, to make backs.
Yes
es 1 ostrich, 2 ostriches
Most times, you add -es. You leave the last s on the name and add the -es.
The plural of desk is desks. Therefore, you add an -s. The word endings that require -es for their plural form are s, z, ch, sh, and x.
There is no reason to think that you should add 'es' to way to make it plural. It follows the same rule as any other word ending in 'y' preceded by a vowel: monkey, monkeys; tray, trays; boy, boys.You may be getting confused between that rule and the rule that applies to words ending in 'y' preceded by a consonant. In that case, you change the 'y' into 'i' and add 'es': baby, babies; pony, ponies; dandy, dandies.