Direct speech repeats, or quotes, the exact words spoken. When we use direct speech in writing, we place the words spoken between quotation marks (" ") and there is no change in these words. We may be reporting something that's being said NOW (for example a telephone conversation), or telling someone later about a previous conversation.
Reported Speech (also called Indirect Speech) is used to communicate what someone else said, but without using the exact words. A few changes are necessary; often a pronoun has to be changed and the verb is usually moved back a tense, where possible. https://www.usingenglish.com/glossary/reported-speech.html
subject+said/told+that+sentence with tense changes
“I’m reading a good book.”
She said she was reading a good book.
"It’s better to wait.!"
She said (that) it was better to wait.
He said (that) he had bought a car
Direct speech & Reported speech
He said, "I live in Paris." He said he lived in Paris.
He said, "I am cooking dinner." He said he was cooking dinner.
He said, "I have visted London twice." He said he had visited London twice.
He said, "I went to New York last week." He said he had gone to New York the week before.
He said, "I had already eaten." He said he had already eaten.
He said, "I am going to find a new job." He said he was going to find a new job.
He said, "I will give Jack a call." He said he would give Jack a call.
We use Reported Speech when we want to repeat what someone had previously said to a third person.
Reported speech is usually used to talk about the past, so we normally change the tense of the words spoken. We use reporting verbs like "say", "tell", "ask", and we may use the word "that" to introduce the reported words. Reported speech doesn't use quotation marks to enclose what the person said.
When reporting questions, it is especially important to pay attention to sentence order. When reporting yes/ no questions connect the reported question using "if". When reporting questions using question words (why, where, when, etc.) use the question word.
Reported Speech (also called Indirect Speech) is used to communicate what someone else said, but without using the exact words. A few changes are necessary; often a pronoun has to be changed and the verb is usually moved back a tense, where possible.