I don’t know what I shall do next.(改为同义句)I don’t know （what to do next.)括号内为答案

I don’t know what I shall do next.(改为同义句)I don’t know （what to do next.)括号内为答案
I don’t know what I shall do next.(改为同义句)
I don’t know （what to do next.)
括号内为答案

I don’t know what I shall do next.(改为同义句)I don’t know （what to do next.)括号内为答案
这是把复合句改为简单句!
在I don’t know what I shall do next. 中,what I shall do next是宾语从句做宾语,
在I don’t know （what to do next.) 中,what to do next是不定式做宾语.