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eg: Why didn't you listen to the teacher but to disturb others...? Is this sentence correct?
I want to express sb. have done sth. he shoudn't do but not do sth. he should do.

Thank you.
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"You didn't listen to your teacher, but disturbed others." is correct.

You could also say :
"Why didn't you listen to your teacher instead of disturbing others."

I'm not sure that's exactly what you're looking for, though.
Comments  
Miriam,

Yes, that's just what I'm looking for. I have seen that before but I can't remember it. I'm now reminded with your help.