请修缮这段文字要求表达要清晰语法要准确。How to Do Things with Words Austin 1962 is one of the most important books on Speech Acts Theory Austin not only first explored the issue of language use but also systematically an

"How to Do Things with Words" (Austin, 1962) is one of the most significant books on Speech Acts Theory. Austin not only explored the issue of language use, but also systematically and concretely studied one of its aspects - speaking as a behavior. Speech act theory posits that saying a sentence is an action performed with words. When people utter a sentence, they perform three types of acts simultaneously: the locutionary act, the illocutionary act, and the perlocutionary act. According to Austin, the illocutionary act expresses the speaker's intention and uses language to accomplish a specific action, known as the illocutionary force. Post-verbal behavior refers to the effect of the intended action on the recipient once they comprehend it. Austin offers unique insights into illocutionary behavior and speech acts, arguing that they are a meaningful unit of speech. He also asserts that the main form of speech act is the speech that completes the action. Additionally, Austin classifies speech acts into five categories to cover their various functions