Englishfor English speakers
of
Preposition
—
Made using.
It is a house of cards.
an
Determinative
—
An (or a) is used when the following word could be any of a certain type.
I just ate an apple.
It is indeed an honor to have met you today.
old
Adjective
—
If someone or something is old, they are not young; they have been in existence for a long time.
An old man has gray hair.
—
How old someone is, is their age.
"Ashley, how old are you?" "I'm only 16 years old."