[palizman]

pls tell me ,which one is correct?and why?

1)by age of
2)at the age of
3)at age of

[susan53]

By the age of and at the age of would both be correct, though with different meanings. Eg :

She was a millionaire by the age of 18 = before and at the age of 18.
She became a millionaire at the age of 18 = when she was 18.

It's the same difference as eg :
You must do it by Tuesday ( = you can do it on Monday if you want, or on Tuesday, but not Wednesday)
You must do it on Tuesday (no other day, before or after, is possible)

[mesmark]

great answer Sue! always very informative, helpful, and includes examples.

[Oden]

Hello Sue,

She became a millionaire at the age of 18.

Would it be fine to say "at age 18" in place of "at the age of 18"?

[susan53]

Grammatically yes. It sounds very slightly more informal to me, but they'd me more or less interchangeable.

[Oden]

Thank you, Sue.

[Oden]

********** Please delete this post later. **********

Quote susan53

Grammatically yes. It sounds very slightly more informal to me, but they'd me more or less interchangeable.

me should've been "be," right?

[susan53]

Yes - sorry. Typo

[nelson13]

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