【正确答案】A speaker might be performing three acts simultaneously when speaking: locutionary act, illocutionary act, and perlocutionary act. A locutionary act is the act of uttering words, phrases, clauses. It is the act of conveying literal meaning by means of syntax, lexicon and phonology. An illocutionary act is the act of expressing the speaker's intention; it is the act performed in saying something. A perlocutionary act is the act performed by or resulting from saying something; it is the consequence of, or the change brought about by the utterance; it is the act performed by saying something.
If somebody utters "It is so hot in the room!", he might be performing three acts simultaneously. The locutionary act performed by the speaker is that he has uttered all the words "it", "is", "so", "hot", etc. and expressed what the words literally mean. The illocutionary act performed by the speaker is that by making such an utterance, he has expressed his intention of speaking, i.e., asking someone, for example, to turn on the air conditioner. The perlocutionary act refers to the effect of the utterance. If the hearer gets the speaker's message and sees that the speaker means to ask someone to turn on the air conditioner, the speaker has successfully brought about the change in the real world he has intended to; then the perlocutionary act is successfully performed.

【答案解析】[解析] 本题主要考查的是言语行为理论(Speech Act Theory)知识，答题时要先就locutionary act，illocutionary act和perlocutionary act进行解释，然后再结合所给的句子进行分析。只要做到了这两点，应该不会有大的失分。