The Difference Between Five Years Old and Five-Year-Old

five years old translates as: five years old. five-year old translates as: five years old. five-year old is a compound adjective, which can only be used as a determiner. five years old, an adjective phrase, can be used as a predicate, but not as a corollary, i.e., it can't be used to modify noun pronouns, etc.

Key vocabulary:

1. year:

n. year; year; calendar year; age; period of a year; a grade.

2. old:

adj. obsolete; ancient; aged

n. ancient times

Expanded Information:

old Usage:

1, Used to indicate the relationship between elder and younger among family members, usually witholder, also withelder in American English.<

2. older refers to the size of age, and can be used both between members of a family and between non-members of the same family.

3. elder and older both mean older, but elder usually points out the difference between two people's length and age, and is an indication of an identity.

older means older.