Final answer:
The sentence "I am meeting John tonight" can be expressed in indirect speech as follows: [The speaker] said that [he/she was] meeting John that night.
Step-by-step explanation:
The given sentence, "I am meeting John tonight," can be expressed in indirect speech as follows:
[The speaker] said that [he/she was] meeting John that night.
Indirect speech is used to report what someone said in a slightly different form. In this case, the original sentence is being reported using the past tense and replacing "I" with a pronoun (he/she) to refer to the speaker. By transforming the sentence into indirect speech, the original statement is still conveyed, but in a different structure. It is important to note that when a statement is reported in indirect speech, there may be changes in verb tenses, pronouns, and time references.