题目内容
Austin’s first shot at the speech act theory is the claim that there are two types of sentences: performatives and constatives.
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For the performative sentences,we can not decide whether they are true or false, but we can judge whether they work or not.
The major difference between a performative verband aconstative verb is whether they are doing an action or not
设f：X→Y，则（）。
设f：X→Y是一双射函数，则Y→X的双射函数为f的逆函数。
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