I made this short video about the topic (fun fact: i love PowerPoint) Select HD!
5 RULES FOR EMBEDDED QUESTIONS
Rule One
If the embedded question is part of a statement, use a period and not a question mark at the end of the sentence. Also, if the question is in the present or past simple verb tense, omit the auxiliary verbs do, does, and did and change the verb to its appropriate form, as in the example below.
Direct Question: What time did he leave?
Embedded Question: I wonder what time he left.
Rule Two
If the embedded question includes an auxiliary verb or the verb "to be", reverse the positions of the subject and the auxiliary verb, as in the examples below.
Direct Question: What did he say?
Embedded Question: Could you tell me what he said?
Direct Question: Can you help me?
Embedded Question: I wonder if you could help me.
Direct Question: Is he a doctor?
Embedded Question: Do you know if he is a doctor?
Rule Three
Do not use a verbal contraction at the end of the sentence.
Direct Question: Where is she?
Correct Embedded: Question Do you know where he is?
Incorrect Embedded: Question Do you know where he's?
Rule Four
Embedded questions are introduced by whether, whether or not, and if when there is no question word in the sentence (yes/no questions).
Direct Yes/No Question: Will he be there?
Embedded Question: Do you know if he will be there?
Do you know whether or not he will be there?
Do you know whether he will be there or not?
Rule Five
The infinitive can follow a question word or whether in embedded questions, as in the following example.
Direct Question: What should I do?
Embedded Question: Please tell me what I should do.
Embedded Question with an Infinitive: Please tell me what to do.
