Answer:
He said he had not left his house for the past one week and his business was suffering.
Step-by-step explanation:
Indirect speech means a different person has done it, but you are narrating what they said. For example, "I ate a sandwich" could be "He said he ate a sandwich". You basically just add a pronoun wherever the word "I" was and at the beginning, just add "[pronoun] said or [pronoun] had" and then whatever they did with the word I as the pronoun you are using.
I know this is really confusing, so please tell me if it is!
I hope this helped you!