Count nouns have two forms: singular and plural.

Singular count nouns refer to one person or thing:

a teacher a book a wish an idea

Plural count nouns refer to more than one person or thing:

teachers books wishes ideas

Singular count nouns

Singular count nouns cannot be used alone. They must have a determiner:

the English teacher that book a wish my latest idea
Singular count nouns 1

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Singular count nouns 2

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Plural count nouns

We usually add –s to make a plural noun:

book > books
school > schools
friend > friends

We add –es to nouns ending in –s, –ch, –sh, –ss, –x and –o:  

class > classes
watch > watches
gas > gases
wish > wishes
box > boxes
potato > potatoes

When a noun ends in a consonant and –y, we make the plural with –ies:

lady > ladies
country > countries
party > parties

If a noun ends in a vowel and –y, we simply add –s:

boy > boys
day > days
play > plays

Some common nouns have irregular plurals:

man > men
woman > women
child > children
person > people
foot > feet
Plural count nouns 1

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Plural count nouns 2

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Plural count nouns do not have a general determiner when they refer to people or things in general:

Computers are very expensive.
Do you sell old books?

But they may have a specific determiner:

Those computers are very expensive.
The books in that shop are very expensive. 
Her sisters live there.

or a quantifier:

some new books a few teachers lots of good ideas

or a numeral:

two new books three wishes
Plural count nouns 3

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Plural count nouns 4

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Plural count nouns 5

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Comments

Is the following grammatically correct?

Please find attached a copy of Document 1 and Document 2.

Hello Jon Lin

It sounds a bit strange to say 'a copy' when referring to two different documents. I'd say 'Please find attached copies of 1 and 2'.

All the best

Kirk

The LearnEnglish Team

Hello.
do you have any suggestion or suggestions?
any can be used before a singular countable noun with the meaning of it doesn’t matter who/which/what.

Hello amirfd,
As you say, it is possible to use 'any' before a singular countable noun when we want to particularly emphasise that any item is acceptable:
> Pass me a book, would you? Any book - it doesn't matter which.
However, when we are asking a question like in your example, we usually either use 'a' (asking for a single item) or 'any' with a plural noun:
> Do you have a suggestion?
> Do you have any suggestions?
We might use 'any' with a singular noun for emphasis after this:
> Do you have a suggestion? Any suggestion at all?
~
Peter
The LearnEnglish Team

Thank you for the complete answer.

Hi Sir,
I'd like to ask this phrase.
'ratings period' n 'rating period'. Why the first phrase uses 's' in word rating? Is it allowed to use s (plural noun)?

Thank you for the answer

Hi Risa warysha,
As you say, the word 'ratings' here is plural. We can use 'rating' as a singular noun when we are talking about a particular score:
"This product has a very high rating on the website."
However, when we are talking about the system we always use the plural form:
"We use a ratings system to monitor customer satisfaction."

Peter
The LearnEnglish Team

Hi Sir
This question is under count nouns. For e.g. Those books are for sale. These computers are expensive.
Are those sentences correct? I have used determiners 'those and these' with plural nouns.
Please let me know.
Thank you.
Regards
Lal

Hello Lal

Yes, both of those sentences are grammatically correct. Whether they are correct for a specific context or not depends on the specific situation.

All the best

Kirk

The LearnEnglish Team

Can we say: The baby was in her stomach?
Or 'womb' is necessary to put in here?
Secondly, is the word 'baby' suitable for the fetus?

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