we don't know when will we do that.哪里错了?

we don't know when will we do that.哪里错了? I really don't know what we will do next. 请问哪里错了 we don't know when we will have the school trip = we don't k l don't know when we will start this afternoon we don't know how to do that.We don't know what makes us lau 改错we really don't know what will do next I don't know what we will do next. 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 start .(改为to do 的结构） We don`t kn we don't know when and where we will go for a holiday.*(同义转换 同义句转化 we don't know when we will have an English test. we don't know when ______ (start)