今回の英語もQuestionです。
We say : Where has Tsuyoshi gone?
but: Do you know where Tsuyoshi has gone?
Do you know の1部分になると順序が変わるということです。
What time is it? → Do you know what time it is?
Who are those people? → i don’t know who those people are?
How much will it cost? → Do you have any idea how much it will cost?
みたいな感じです。
練習として
Do you know what time the film starts?
Why does Amy get up so early every day?
I can’t remember where I parked the car.
He asked me how long I had been back
など以上です。