What is Indirect Interrogative Sentences?
What's the simplest way to explain it?
google is your friend. You might start here:
http://www.studyandexam.com/indirect-speech-for-interrogative.html
Indirect interrogative sentences are statements that are formed as questions but are used to ask or talk about something indirectly. They are commonly used in situations where the speaker wants to be polite or less direct. In indirect interrogative sentences, the order of the subject and verb is usually inverted, just like in a direct question.
To explain it simply, indirect interrogative sentences are when we ask or talk about something indirectly using a question format. It's a way of being polite or less direct in our communication. For example, instead of saying "What are you doing?" directly, we can say "I was wondering what you are doing?" to make it more indirect.