I don't know what do you say.为什么what后面要加do?I don't know what you say.不可以吗.

i don't know what to do Don't know what i'd do 同义句:I don't know what I can do .转换：I don't know what ( ) ( ). I don't know what should I do转变I don't know()()() I don't know what I should do 同义句 I don't know what i should do（同义句) what should I do 同义句I don't know ( )( )( ). I understand,but,I don't know what to do? ou?I don't know what I should do?maybe you don't know either 是I don't know what should I do．还是 I don't know what Ishould do． 翻译I don't know what to say or do. i don't know to do what 对吗 i don't know shane,what do you think i don't know ()to do.填what还是how I don't know what ( )(do) after dinner 英语翻译I don't know what should I do?若不算,则I don't know ------ ------- I do. I don't know what can I do 还是 I don't konw what I can do I don’t know what to do.I don’t know how to do.（ × ） 第二句 how 怎么错了?I don’t know what to do.(正确) I don’t know how to do.（ × ）