Adverbial（狀語）can be used to describe predicate in a sentence, regardless the predicate is a noun, an adjective, a verb, a clause or a complete sentence.
Unit 5 : More on adjective and adverb（形容詞、副詞）
Pro-adverb（代動詞）, pro-adjective（代形容詞）and pro-verb（代動詞）are used to substitute adverb, adjective and verb and their meanings are depending on the context.
To indicate something is in an equal degree with something with an adjective（相等級）, you have to use 一樣[jat1 joeng6] and 咁[gam3] as the adverb of the sentence.
For creating comparative adjective in Cantonese, phase complement（狀態補語）過[gwo3] has to be used in the structure of predicate-complement（謂補式）
冇[mou5] can be used to indicate that something is inferior comparing with something else with the use of adjectives.
最[zeoi3] is an adverb and it can be used to create a superlative adjective（最高級）in Cantonese.