There are certain situations where nouns do not require any kind of article (definite or indefinite) before them. Such instances are discussed below-
If proper or abstract uncountable noun is used in general sense, article need not to be used before the noun. e.g.
- Diamond is an expensive material.
- Knowledge is the power.
- Calcutta is known as the city of joy.
Article is not put before plural countable nouns which are used in general sense. e.g.
- Children are innocent.
- Dogs are faithful animal.
No article is used before language, country, names of days and months. e.g.
- Mount Everest is located in the Mahalangur Himal sub-range of the Himalayas.
- December has 31 days.
- He speaks in English.