This unit covers the use of articles with countable nouns. Countable nouns can be preceded by determiners such as definite and indefinite articles. This usually happens with singular countable nouns, but the definite article “the” can also be used with plurals.
Examples:
He saw a cat in a tree.
Tim and Kathy planted the trees in their backyard.
Roger picked up the empty can.
The first sentence has two countable nouns preceded by the indefinite article “a.” The second example has the definite article “the” before a plural noun, and the last one has “the” before a singular noun.
There are other determiners that can occur before a countable noun, including numbers, possessive adjectives (my, your, his, its, her, our, their), possessive nouns (e.g., my father’s), and demonstratives (this, that, these, those).
Examples:
Your parents are very nice.
Her brother’s surfboard is colorful.
This movie is boring.
I have two bikes.