ELISA ENGLISH's Blog 英語園地

Embedded questions are questions within another statement or question. They function as noun clauses and as such should generally follow statement, not question, order.

For example:

1.     What is he trying to tell me?  (Question Order)

2.     He is trying to tell me something.  (Statement Order)

3.     I don’t know what he is trying to tell me.  (Embedded question – following Statement Order.)

4.     How does he do that? (Question)

5.     He does that in a way nobody can tell. (Statement)

6.     I am puzzled as to how he does that. (Embeded question)

See http://free-english-study.com/grammar/embedded-questions.html for more details.