What is the difference between “no” and “not”?
there is a question always confusing me. Is it 'no good' or 'not good'? How do I use them? I guess they are different, but I never know what is the difference! Thank you in advance!
From OED (good):
No good functions as both an attributive adjective (e.g., a no-good dirty dog) and noun (e.g., what a no good)
On the other hand, saying that something is not good is just indicating that the adjective 'good' does not apply to it. In many instances, no good and not good can both be used. No good is certainly the more informal alternative.
The only difference I can immediately think of is:
'No good' implies doing something, so an idea is 'no good', a lamp is 'no good' if it doesn't light and software is 'no good' if it doesn't work.
'Not good' seems more of a property of the substance, so milk that has gone bad is 'not good'