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I have found a similar topic addressing the use of "comprise" but my question is not exactly in line with that question. I did ask this question there to keep the topic related to the us of "comprise" but it was removed since I did not follow protocol. So my apologies if this seems like a duplicate entry.

When does one use "comprises of" and when "comprise"? Are they interchangeable?

"My name comprises 5 letters"

"My name comprises of 5 letters"

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This much I know, but other sources I have found indicate an increased usage of "of" in recent years, showing acceptance of the word. Have a look at the discussion labelled "Compose and Comprise" –  NamSandStorm Mar 19 '13 at 9:36
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closed as general reference by tchrist, Kristina Lopez, Mitch, cornbread ninja 麵包忍者, Robusto Mar 20 '13 at 15:01

This question is too basic; it can be definitively and permanently answered by a single link to a standard internet reference source designed specifically to find that type of information.If this question can be reworded to fit the rules in the help center, please edit the question.

2 Answers

A quick look in a decent online dictionary is advisable:

comprise Usage: The use of of after comprise should be avoided:

the library comprises (not comprises of) 500 000 books and manuscripts Collins English Dictionary – Complete and Unabridged Collins.

I don't think US usage is any different.

Another quote, from the internet (repunctuated):

Never use 'comprise of' or 'comprises of' - but 'comprised of' is allowed.

This is a passive (or arguably adjectival) usage involving comprised which some consider to be ungrammatical (see http://grammarsource.com/2007/03/26/comprised-v-is-comprised-of/ ) .

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I support Mr Edwin Ashworth. When used in the active voice, COMPRISE is not followed by OF but when used in the passive voice, it is followed by OF: The programme comprises two short plays. The programme is comprised of two short plays.

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