3. Noun clauses as an indirect object:

a. I will give whoever gets the best mark a new bike.
                                       I.Object

b. Martha will send whoever she sees playing to the principal’s office.
                                                   I.Object

We can use noun clauses connected to other expressions to report what someone said or did.

Study the list of expressions:

I don’t know:	I don’t know when they are coming.
Please tell me:	Please tell me where he lives.
I don’t understand:	I don’t understand what your point of view is.
I didn’t hear:	I didn’t hear what his name is.
Tell me:	Tell me where the teacher is.
I wonder:	I wonder why he abandoned me.
Can you tell:	Can you tell me how your students do?
Do you know:	Do you know if he is coming back?
I’m not sure:	I’m not sure who he is.
Could you please tell:	Could you please tell me how to use a credit card?

As you could see above, after those expressions, you have to write the sentences in the same order that they go in affirmative sentences, considering the tense they have.

Examples:

Present simple
Where does he live?

More examples:

When did he leave?
What did he say?
Why is Tom absent?
Who is that boy?
Whose pen is this?
Who has she seen?
When is he going to call me?

Present simple
I don’t know where he lives.

Affirmative order

Do you know when he left?
Please tell me what he said.
I wonder why Tom is absent.
I don’t know who that boy is.
I don’t know whose pen this is.
I wonder who she has seen.
Please tell me when he is going to call me.