SOCIOLINGUISTIC:
We use indirect questions to sound more polite, or less blunt.
TRUE.
D: Is Moriarty a criminal?
I: Can you tell me if Moriarty is a criminal?
simple present
D: What time will Sherlock meet Watson?
I: Can you tell me what time Sherlock will meet Watson?
future simple
is she unhappy?
Can you tell me if she is unhappy?
Do you know why he went to the store?
STRUCTURE-WISE
When it's a yes/no question, we remove the auxiliary verb and don't add anything.
FALSE.
We add "if"
D: Why was Sherlock so afraid of Irene Adler?
I: Can you tell me why Sherlock was so afraid of Irene Adler?
simple past
D: Is Sherlock going to tell Lestrade what he believes?
I: I wonder if Sherlock is going to tell Lestrade what he believes...
Future with "going to"
When is the restaurant closing?
Can you tell me when the restaurant is closing?
Is she pregnant?
Do you know if he is pregnant?
When it's an open answer question, we remove the auxiliary verb and add "if"
FALSE
We don't add "if".
D: Why haven't you read my paper yet, dear Watson?
I: Dear Watson, could you, please, enlighten me as to why you haven't yet read my paper?
present perfect
D: Did you do the homework??
I: Can you tell me if you did the homework?
Simple past
Why was he late for the meeting?
Can you tell me why he was late for the meeting?
Where does she live?
I wonder where she lives.
In an indirect question, the verb comes after the subject.
TRUE
D: Why are you still insisting that I read your paper?
I: I wonder why you are still insisting that I read your paper.
D: Was Morty playing videogames last night?
I: I wonder if Morty was playing videogames last night.
Past continuous
What were you doing at 3pm?
Can you tell me what you were doing at 3pm?
will you buy sushi?
Can you tell me if you will buy sushi?
Even though we remove the auxiliary verb and the verb is placed after the subject, we still keep the question mark in indirect questions.
IT DEPENDS!
D: How long has Watson worked in this laboratory?
I: I would like to know how long Watson has worked in this laboratory.
Present perfect
D: Do you like to go to the beach?
I: Can you tell me if you like to go to the beach?
Simple present
Are you ok?
I was wondering if you are ok.
When have they been to California?
Do you know when they have been to California?