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If I want to ask if something sounds stupid. Do I ask:

"Doesn't it sound stupid" OR

"Isn't it sound stupid"
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Doesn't it sound stupid implies I think it sounds stupid. You agree, don't you?
Comments  
You should say "Doesn't it sound stupid?" (an interrogative native/a negative interrogative question). Or "Does it sound stupid?" (a simple/plain question), not "isn't it sound stupid?" or "is it sound stupid?". The underlined are ungrammatical.
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 Blue Jay's reply was promoted to an answer.
Blue Jay, Is it that if we say 'doesn't it sound stupid?', we're expecting the listener to say 'yes'?

Thank you.
TomJBlue Jay, Is it that if we say 'doesn't it sound stupid?', we're expecting the listener to say 'yes'?Thank you.
Yes, we think they will agree with us.
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Is correct to say: Does'nt it sound good to have an American friend?

class chalk 79

Is correct to say: Does'nt Doesn't it sound good to have an American friend?

Yes, but "doesn't" is spelled as shown above.

CJ