Analyze and comment on the following.How do you distinguish compounds from free phrases? Give examples to support your point.
COMPOUNDS DIFFER FROM FREE PHRASES IN THE FOLLOWING THREE ASPECTS.
（1）PHONETIC FEATURE—STRESS PATTERN. IN A COMPOUND, THE STRESS USUALLY FALLS ON THE FIRST ELEMENT WHEREAS IN A FREE PHRASE THE STRESS OCCURS ON THE SECOND ELEMENT, E. G. GREEN HAND/'GRI：NHæND/(COMPOUND) ./GRI:N‘HæD/(FREE PHRASE).
（2）SEMANTIC FEATURE. THE MEANING OF A COMPOUND IS GENERALLY DIFFERENT FROM THE COMBINATION OF THE TWO ELEMENTS WHEREAS THAT OF A FREE PHRASE IS NOT，E. G. “RED TAPE” AS A COMPOUND MEANS “BUREAUCRACY”, BUT AS A FREE PHRASE IT MEANS “A TAPE THAT IS RED IN COLOUR”.
（3）GRAMMATICAL FEATURE. EACH COMPOUND IS A GRAMMATICAL UNIT WHICH IS INSEPARABLE, SO GENERALLY NO CHANGES SHOULD OCCUR WITHIN IT, E. G. “FINE ART” CANNOT BE CHANGED INTO “FINER ARTS”. 
