Explanation:
When reporting orders or commands, there are certain structures that are used. These structures involve changing the verb form and the pronouns in order to accurately report what was said. However, one of these structures is not used when reporting orders.

Structure A: Order somebody to
When reporting an order, the structure "order somebody to" is commonly used. This structure involves changing the verb form from the imperative (telling someone directly what to do) to the infinitive form preceded by "to." For example:

Direct speech: "Clean your room!"
Reported speech: She ordered me to clean my room.

In this structure, the subject of the original order becomes the object of the reporting verb, and the object of the original order becomes the object of the verb "to."

Structure B: Tell somebody to
Another structure that is used for reporting orders is "tell somebody to." This structure also involves changing the verb form from the imperative to the infinitive form preceded by "to." However, in this case, the subject of the original order remains the subject of the reporting verb. For example:

Direct speech: "Go to bed!"
Reported speech: She told me to go to bed.

In this structure, the reporting verb "tell" is followed by the object pronoun, and the verb "to" is used before the infinitive form of the original order.

Structure C: Ask somebody to
The structure "ask somebody to" is not used for reporting orders. Instead, it is used for reporting requests or asking someone to do something. When reporting an order, it is more appropriate to use the structures mentioned above. For example:

Direct speech: "Pass me the salt!"
Incorrect reported speech: She asked me to pass her the salt.

In this case, the reported speech is incorrect because the original statement is an order, not a request. The correct reported speech would be:

Correct reported speech: She told me to pass her the salt.

Therefore, the structure "ask somebody to" is not used for reporting orders.

Structure not used for reported orders:
- Ask somebody to: This structure is not used for reported orders.
Explanation:
- Reported orders are sentences that report what someone else has said or ordered.
- There are several structures used for reporting orders, such as "order somebody to," "tell somebody to," and others.
- However, the structure "ask somebody to" is not typically used for reported orders.
- When reporting an order using the "ask somebody to" structure, it implies a request rather than a direct order.
- For example, if someone says, "Could you ask John to clean his room?", this is a request rather than a direct order.
- In reported speech, this would be reported as "They asked me to ask John to clean his room," indicating that it was a request and not a direct order.
- Therefore, the structure "ask somebody to" is not used for reported orders.