It's "a pair of pajamas". The word "pajamas" only has a plural form; therefore, it cannot be used with numbers or the article "a".
It's "a pair of pajamas". The word "pajamas" only has a plural form, and therefore it cannot be used with numbers or the article "a".
She has to buy a new pair of pajamas.
She has to buy a pajamas.
However, you can use the expressions "a pair of pajamas", "two pairs of pajamas", "three pairs of pajamas", etc.
I bought a pair of pajamas.
How many pairs of pajamas do you have?
We commonly use a possessive pronoun (my, your, his, her, etc.)
Alice can't go out now because she's already in her pajamas.
But you can omit the determiner in many situations.
Pajamas should fit your personality.
Plural nouns, like "pajamas", always take a plural form of a verb; thus, we say "pajamas are", not "pajamas is"
Are your pajamas comfortable?
Is your pajamas comfortable?
Follow the same practice with other plural nouns, including: