david said,"i will do it".
Answers
Indirect/Reported Speech refers to a dialogue being told to a third person/reporting what happened to a third person.
Example: Icarus said,"I will be travelling next month." (Direct)
Icarus said that he would be travelling the next month. (Indirect)
In the above example, when writing in indirect/reported form, the sentence changes according to its tense. Also, modifications regarding certain words like 'this' changes to 'that', 'tomorrow' changes to 'the next day', 'will' changes to 'would', 'can' changes to 'could' and many other words have to be made. Also, if the sentence is contains an interrogation, then 'said' changes to 'asked'. Punctuation marks other than a full stop (.) cannot be used in indirect/reported speech.
David said,"I will do it." (Direct)
David said that he would do it. (Indirect)