Question

He said to her. "why were you crying last night?"​

Answer 1

Answer:

He asked her why she was crying last night.

Answer 2

Answer:

He asked her why she had been crying the previous night.

Explanation:

*The given question is in direct speech,interrogative sentence-"wh" type.

*We have to convert the question into indirect speech.

*So we have to follow the interrogative rules.

*In the reporting speech,"said to" is changed into "asked".

*In the reported speech,comma and quotation are removed.

*Tense,pronoun and adverb are changed.

*So the answer is,

He asked her why she had been crying last night.