I don't know when we shall meet again .(改为简单句）

I don't know when we shall meet again .(改为简单句） I don't know when we shall start.(改为简单句) I don't know ____ _ l don,t kuow when we shall meet again变成简单句 I don't know when we shall leave for Moon Bay.(改为简单句)为什么用to? 英语改写句子,急用I don’t know when i shall start the work （改为简单句）I d We don't know where we shall meet.改为同义句 I don't know when we will begin the work.改为简单句. I don't know when we shall shart the work.(保持原句意思） 初中英语（急）we don't know when we shall begin the holiday.（改写成简单句 句型转换We don't know when we shall give a fashion show.（改为同义句）W I don't know when I can climb the Great Wall(改为简单句） when shall we meet again?