of - be of good quality

[uniopp]

Can someone explain the following "of"?
Your gift should be of good quality but modestly priced. When you plan to give a gift to several people within an organisation, be sure to give a gift of greater value to the senior person.
Are they both the same type of "of"? Can I drop the first one and just say "be good quality"?
How about this one, is it the same kind of "of" -
be of help
Any other examples of the structure and how to use would be much appreciated.
Thank you.

[Chicken Sandwich]

NOT A TEACHER

Yes, they're the same kind of "of". Leaving out "of" is not possible.

Your gift should be of good quality but modestly priced.

Your gift should be good quality but modestly priced.

[tzfujimino]

Hello.
This sort of '(be+) of + (abstract) noun' basically functions like an adjective in my opinion.
Please see here (definition #9): Merriam-Webster's Learner's Dictionary

be of value = be valuable
be of help = be helpful
be of quality = be very good

etc...

I hope I'm not talking nonsense.

[uniopp]

Thanks for the replies.

The Merriam-Webster's Learner's Dictionary was very helpful.

The "be" is also confusing. Can you correct/complete the following -

be of value
be= ?????
of= preposition
value= abstract noun (must this always be an abstract noun?)

be valuable
be= ?????
valuable= adjective

Am I correct to say that "be of ......." is the abstract noun form and "be ......" is the adjective form??

Is the "of" preposition always required??

Thanks.

[tzfujimino]

Thanks for the replies.

The Merriam-Webster's Learner's Dictionary was very helpful.

The "be" is also confusing. Can you correct/complete the following -

be of value
be= ????? I'm not really sure what you're confused about. "be= verb" - Is this what you're asking about?
of= preposition
value= abstract noun (must this always be an abstract noun?) We need some native speakers' opinions, I suppose.

be valuable
be= ????? Please see above.
valuable= adjective

Am I correct to say that "be of ......." is the abstract noun form Yes, after the preposition 'of' you'll need a noun.
and "be ......" is the adjective form?? To express the same idea, yes, I think so.

Is the "of" preposition always required?? We need some advice from native speakers.

Thanks.

Hello, again.
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