WH-CLAUSESI don't know

PROBLEM:

EXAMPLES: I don't know

I don't know why he took Delta to Dallas. Southwestern is cheaper.
I don't know why she sold her house. (LISTEN)
He doesn't know when he will be transferred to Hong Kong.
I don't know why he moved to Vancouver.
She doesn't know why he was late to class.
Who did she go to the marketing meeting with?
I don't know who she went with.
Does she know when they will arrive?
No, she doesn't.
Does Roger know how to get to the airport?
No! He has no idea!

SUBJECT + don't know

+ how, who, what, where, when, which

+ pronoun+ verb