Qualitative adjectives are different when working as adverbial. Considering this difference, adverbials can be divided into two categories, A and B, aslo called active adjectives and inactive adjectives. Qualitative adjectives which fall into category A mostly haveã€+active】andã€+intended】semantic features, qualitative adjectives which fall into category B mostly haveã€-active】andã€-intended】semantic features. Besides, category A adjectives, which can be used as adverbials also have certain difference in the dependence of the mark"de".There are three forms of adverbial which is made of qualitative adjectives: qualitative adjectives ,"qualitative adjectives+de", and"qualitative adjectives+(de)".Finally, reasons of the appearance of"de"is discussed.
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