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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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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.

    
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

2 Answers 2

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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