The structure"Haidei+VP"(还得+VP;still have to+VP)possesses multiple modal meanings,with its modal functions closely connected to logical semantics and syntactic forms.When expressing deontic modality,it involves the only choice,forced choice,strong choice,or additional choice;when expressing epistemic modality,it involves multiple choices,speculative choices,or preferred choices.When the comparative object is missing in the context,"Haideishi+NP"(还得是 NP)gradually becomes conventionalized,where the choice meaning is weakened,and the exclamation meaning is strengthened.This construction is used by speakers to make an exaggerated exclamation about a certain behavior of the interlocutor or a specific object,which is common in online social contexts,especially prominent in news headlines.The motivation for its conventionalization is pragmatic demand and subjectification,involving mechanisms such as pragmatic inference and analogy,and the degree of conventionalization is related to the focus degree of"NP".
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