请修缮这段文字要求表达要清晰语法要准确。Expressive speech act the speaker expresses a state and emotion of his heart through words Such as congratulations apologies thanks welcome etc For example1 Let me start with civil

Expressive speech acts refer to instances where a speaker expresses their emotions and state of mind through spoken words. Examples of such acts include offering congratulations, apologies, expressing gratitude, and welcoming others. For instance, the speaker may say, "Let's begin to create a new atmosphere now, starting with civility." Another example is, "It is important to strictly adhere to principles of diligence, thrift, and opposing extravagance and waste."