Explanations:When converting a sentence from direct speech to indirect speech, it is important to follow specific rules regarding tense and time references. The primary rule is that the tense of the original sentence is typically shifted back by one tense. For example, the present tense in direct speech becomes the past tense in indirect speech. Additionally, time references such as "tonight," "yesterday," or "tomorrow" are adjusted to reflect the time at which the original statement was made. For instance, "tonight" becomes "that night," "yesterday" becomes "the previous day," and "tomorrow" becomes "the next day."
In the given sentence, "John said, 'I am leaving for Bangalore tonight,'" the direct speech uses the present tense "am leaving" and the time reference "tonight." When converting this to indirect speech, the present tense "am leaving" should be changed to the past tense "was leaving." The time reference "tonight" should be adjusted to "that night" to reflect the time at which John made the statement.
Therefore, the correct indirect speech form of the sentence is "John said that he was leaving for Bangalore that night." This option correctly applies both the tense change and the adjustment of the time reference.
It is important to note that the tense change is necessary to maintain the accuracy of the reported speech. If the tense is not changed, the indirect speech would imply that the action is still in the present, which is not the case since the statement is being reported after it was originally made. Similarly, the time reference must be adjusted to reflect the time at which the original statement was made, not the time at which it is being reported.
Understanding these rules and applying them correctly is essential for accurately converting direct speech to indirect speech. This skill is particularly important in language exams and in everyday communication where the accurate reporting of statements is necessary.