We don`t know when we shall start .(改为to do 的结构） We don`t kn

We don`t know when we shall start .(改为to do 的结构） We don`t kn I don’t know when we shall start the work. I don't know when we shall start.(改为简单句) I don't know ____ _ we don't know when ______ (start) we don't know when we will go on a field.(改为同义句) we don't kn We don't know when we shall leave for Nanjing. we don't know when we'll start.(改为简单句) I don't know when we shall meet again .(改为简单句） We don't know what we shall do.同义句we don't know_ _do We don't know what to do.(改为复合句) l don't know when we will start this afternoon We don't know what to do.