I don't know what to do next,这句话哪里错了,为什么啊

I don't know what to do next,这句话哪里错了,为什么啊 i don't know to do what 这句话到底错在哪里? I really don't know what we will do next. 请问哪里错了 请问I don't know what to do next.中的what to do next是宾语从句吗?为什么? i don"t know what to do (next) 和i don"t know how to do (next i don't know how to do next还是what to do next I really don't know ( ).A.what to do the next B.what to do i 请问i don't know (how i should do) next 这句话为啥是错的? we don't know( )next A:hom to do B:what to do选什么 为什么 I don 't know what I shall do next.近义句 I don't know what to do i don't know how to do next还是what to