Unit 2: Countable/Uncountable Nouns + Articles
When a countable noun is singular, it is used with an indefinite article a/an; when a countable noun is plural, it ends in –(e)s.
Example: To request extra credit card for other members of your household, call our automated service line. (not correct)
A countable noun must be used with an indefinite article a/an in the singular form; otherwise it should end in –(e)s in the plural form. (card/cards)
The electronics company has recruited staff from several of its competitor. (not correct)
A plural noun must be used after such determiners as several, some, many, etc. (competitor competitors)
B. Uncountable nouns
Uncountable nouns refer to substances, concepts etc that we cannot divide into separate elements. An indefinite article a/an cannot be used with an uncountable noun. Besides, an uncountable noun in the subject position must be used with a singular verb.
Uncountable nouns are singular in form.
Example: The equipment you ordered are scheduled to be delivered on August 26. (not correct)
Because equipment is uncountable, it is singular and is used with a singular verb. (are – is)
Uncountable nouns cannot be used with an indefinite article a/an.
Example: They helped needy people by the provision of a clothing, food, and shelter. (not correct)
Uncountable nouns cannot be used with an indefinite article a/an. (a clothing)
Uncountable nouns that frequently occur in the TOEIC test
advertising, equipment, information, pollution, traffic, advice
furniture, machinery, recreation, luggage/baggage
clothing, knowledge, homework, merchandise, money, stationery, scenery, fun, employment, leisure.
Podcast Link – learners in Mainland China.
Youtube Video – Rest of The World
Arsenio's ESL Podcast 
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