Embedded Questions (Hard) — Advanced Indirect Questions

Advanced embedded questions combine indirect question structures with complex tenses, multiple clauses, and formal language. At B1-B2 level, you must handle present perfect embedded questions ('I don't know how long she has been waiting'), past continuous ('Nobody could explain what was happening'), and modal combinations ('Could you tell me when we should arrive?'). Each of these keeps statement word order inside the embedded part while the main sentence can be a statement, question, or negative.

A common advanced challenge is double embedding — when the embedded question itself contains another structure: 'I wonder if she knows where he has gone.' Here, 'where he has gone' is embedded inside 'if she knows,' which is embedded inside 'I wonder.' Another important point is that embedded questions after 'I wonder' and 'I'm not sure' do not need a question mark because the whole sentence is a statement: 'I wonder where they went.' is correct — not 'I wonder where they went?' Mastering these patterns demonstrates strong grammatical control for Cambridge B2 First and IELTS band 6 and above.