I don’t know what to do.I don’t know how to do.（ × ） 第二句 how

I don’t know what to do.I don’t know how to do.（ × ） 第二句 how i don't know ()to do.填what还是how 为什么I don't know what to do成立而I don't know how to do不成立 i don"t know what to do (next) 和i don"t know how to do (next I don't know "What to do 和 I don't know "How to do it"?哪个句子是 正常译法是i don't know what to do ,为什么不能用i don't know how to do i don't know how to do it句型转换 I don't know what to do i don't know how to do next还是what to do next I really don't know -----with it.A .what to do B.how to do 选 I don't know how to love you,what to do,hao to move i don't know how to do next还是what to