Does vs Is

[Ash61]

Hi, just a quick question; why do we say "is it worth it?" but we also say "does it matter?"
Is there a discrepency here in the usage of Is and Does?

Ash

[Kitosdad]

No, both are correct.

You couldn't say, "Does it worth it?", or, "Is it matter?"

Both would be grammatically incorrect.
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[Ash61]

Thanks for taking the time and looking into my question but what you said didn't answer the question "why".

[Beeesneees]

Sometimes there is no easy answer ash.
'is' derives from the verb 'to be' whilst 'does' derives from the verb 'to do'.

They are simply the incorrect words.
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[Torsten]

Hi, I think the answer is this:
We use 'is' in connection with an adjective and 'does' in connection with a verb. ('Worth' is an adjective and 'matter' is a verb.)

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[Alan]

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Hi Ash,

I'm interested in your question:

[Ash61]

OK let me give a little bit of background here, even though English is not my mother tongue I have been living in an English speaking society for 10 years and for 10 years before that I used English for a big part of my daily life so suffice to say I speak English fluently but I got now to the point where I don't think about it I just know it almost as native English speakers but! my brother joined me here a few years ago and his English is fine but his grammar still needs some work and when I correct him I need to convince him and not just say "that's the way it is" and lately he has been saying "does it worth it" and insists that I convince him why it is wrong.

Beesnees answer is the one I came up with but I just wanted more solid answer for him.

I already advised him to join this site which allows him to get English courses while keeping his day job.

Thanks for all your help.

Ash

[Ash61]