Making plural nouns is simple: 1 computer – 2 computers. Pretty straight forward, right?
Wrong!
When it comes to making nouns plural, there are no clear-cut rules.
The exceptions to the rules exceed the rules themselves, for example:
If the plural of box is boxes, why is the plural of ox – oxen?
If the plural of safe is safes, why is the plural of wife- wives?

It gets even worse…
1 foot becomes 2 feet
1 man becomes 2 men
1 child becomes 2 children
If 1 goose becomes 2 geese, why doesn’t 1 moose become 2 “meese”?

Some nouns keep their singular form when they become plural:
1 fish – 2 fish
1 sheep – 2 sheep

Some plural forms are based on rules from foreign languages, and follow no rule whatsoever:
Basis – bases
Criterion – criteria

How do I know what the plural form of each noun is? You may wonder.
Memorizing them or looking them up in the dictionary may be tedious work;
WhiteSmoke Writer, the most comprehensive English Grammar Software, punctuation and style checker in the world today, will make your life a lot easier. WhiteSmoke Writer will automatically correct your plural forms in case there are incorrect.