Beispiele
Direkte Rede Übergeordneter Satz Indirekte Rede
"Tom writes a letter." The teacher said (that) Tom wrote a letter.
"She is reading a book." He said (that) she was reading a book.
"I met your friend." They had said (that) he had met your friend.
"We had gone to the theatre." He said (that) they had gone to the theatre.
"They will have a party." It is said (that) they would have a party.
"I'm going to bake a cake." She said (that) she was going to bake a cake.
"You will have been to London." They would say (that) I would have been to London.

Steht das einleitende Verb in einer Vergangenheitszeit (simple past, past perfect, conditional) dann sind die Zeiten des untergeordneten Satzes zu korrigieren, jede Zeit rückt eine Zeit nach "hinten".

Eine genauere Erklärung, warum eine Anpassung der Zeiten nur notwendig ist, wenn das Verb, das die indirekte Rede einleitet bzw. den Prozess der mentalen Durchdringung beschreibt, in einer Vergangenheitszeit steht, finden Sie hier.