Select the correct indirect form of the given sentence.

 He said, “When I saw her, she was playing football.”

He said that when he had seen her, she had been playing football.

The correct indirect form of the given sentence is:

He said that when he had seen her, she had been playing football.

The other options are incorrect for the following reasons:

• He told us that when he saw her, she was playing football. This sentence is correct in the sense that it is in the indirect form, but it is not the most specific way to report the speaker's words. It is better to use the past perfect tense to indicate that the action of playing football happened before the action of seeing her.
• He said that when he had seen her, she had been playing football. This sentence is incorrect because the pronoun "she" is in the first person. In indirect speech, the pronouns in the reported clause must be the same as they would be if the clause were direct speech.
• He said that when he saw her, she was playing football. This sentence is incorrect because it is in the direct form. In indirect speech, the reporting verb must be in the past tense and the reported clause must be in a subordinate tense.