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Anonymous Posted 16 years ago
Grammar

...month old vs ...months old . . . which is the correct?

What is the correct way to phrase the following?

a child of 12 months old that hasn't begun to speak . . .
a 12 month old child that hasn't begun to speak . . .

What's the difference if there is one and in what situation would each one be correct?
  

Top answer

When using compound adjective, the plural form of the noun is omitted. e. I am taking a two-week vacation to Hawaii.

  • When using compound adjective, the plural form of the noun is omitted.
  • e.
  • I am taking a two-week vacation to Hawaii.
  • I am bring along my 8-year old son.
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2 Answers
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When using compound adjective, the plural form of the noun is omitted. i.e.

I am taking a two-week vacation to Hawaii.
I am bring along my 8-year old son.
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a child 12 months old
a 12-month-old child (notice that there are 2 hyphens)

a child of 12 months

All 3 are synonymous.

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