Why indicative in a indirect question?

1. What are the rules for indirect questions?
2. Why do people use indirect questions?
3. Does an indirect question need a question mark?

What are the rules for indirect questions?

In indirect questions the order is subject + verb. There are other expressions that follow the same rule: I don't know what he is doing here. I wonder when he will find the truth.

Why do people use indirect questions?

Indirect questions are a more polite way to ask for information or make requests. We often use them when asking something of strangers or people we do not know well, including coworkers. We also use them when asking for favors from friends or when we want to avoid sounding demanding.

Does an indirect question need a question mark?

There is one type of question that never takes a question mark: the indirect question. Indirect questions are embedded within declarative statements: The chicken asked whether anyone wanted to cross the road with her.