Pragmatic conditions refer to the background conditions and contextual factors in language expression, which play a key role in understanding and explaining a speech act. They include the following aspects: knowledge background: the information, common sense and cultural background shared by the speaker and the listener. Context: The specific environment in which speech acts occur, including time, place, participants and events. Purpose and intention: the purpose, intention and expected effect expressed by the speaker in language. Inference and speculation: Inference and speculation based on context and premise information.

2. Pragmatic value refers to the utility and importance of speech acts. It focuses on the purpose achieved by the speaker through language and the influence of implication. Pragmatic value can include the following aspects: information transmission: speech act realizes intention and purpose by transmitting information to the listener. Establishment of social relations: Speech acts can be used to establish and maintain social relations, including showing goodwill, friendship and social identity. Express the speaker's attitude and emotions: Speech acts can be used to express the speaker's attitude, emotions and opinions, thus causing the listener's response. Oral expression ability: Speech acts can show the speaker's oral expression ability and communication ability.