There have been a lot of in-depth researches on the various structures of"projection"in the field of systemic func-tional linguistics,but there is a relative lack of description on the systemic network of"embedded projection".Based on rele-vant literature and linguistic phenomena,this paper proposes a system network with"embedding"as an entry condition,with two major subsystems,namely,"logico-semantic relations"and"ranking".The logico-semantic relations distinguishes be-tween"projection"and"expansion",and describes the phenomenon of abstract nouns as Head with the term"categoriza-tion".The new system network is consistent with the clause complex system network by logic,and is more suitable for cross-linguistic semantic,grammatical and functional comparison.Based on the new systemic network,the article investigates the system of categorization of embedded projection in English and Chinese.
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