間接疑問文
What
He didn't say what time he would arrive.
Do you remember what her name is?
Why
They are trying to figure out why the system crashed. Can you tell me why you chose this design?
When
I don't know when the meeting starts.
Could you tell me when you are free?
Who
I wonder who left the door open.
Do you know who will be speaking at the conference?
How
She asked how the project was progressing.
Can you explain how this machine works?