İs there any particular rule for choosing which one to use (not or non) in a sentence .
(I have searched but could not find !!!)
The fact that being idiomatic use (not or non) is changing depending on the adjective being used in the sentence.
Which sort of adjectives are ok with ''not'' which sort of adjectives are ok with ''non'' ?
For example;
With the use of adjective ''beatiful'' ''not'' is the idiomatic one.
1a) She is not beatiful
1b) She is nonbeatiful .
''NOT'' is the idiomatic one.
However, with the use of adjective ''existent'' , ''non'' is the idiomatic one.
2a) Wildlife is virtually not existent in this area.
2b) Wildlife is virtually nonexistent in this area .
''NON'' is the idiomatic one