句末语气词在表达口气时，具有增添口气、消减口气、指明疑问点、暗示预设等四种语用功能。
The functions of the toned words at the end of sentences are to add or decrease tone, to point out questioning points and to preset the implication.
本文从语义、语用的角度对有疑而问的疑问句进行考察，着重探讨此类疑问句的问域、问点、预设及其恰当性问题。
This paper studies the interrogative range, interrogative gist, presupposition and appropriateness of question from the views of semantics and pragmatics.
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