【解析】I have no idea 说法正确意思:我不知道/我没有想过/我没有主意。
I have no idea=I don't know.常常用来避免重复。no否定名词,not否定动词,常常与助动词、情态动词连用
I have not a idea 表达错误正确说法:I don't have an idea.意思同上句
I have no idea 说法正确,意思是我没有主意。
I have not a idea 表达错误。正确的说法是I don't have an idea.意思同上句
I have no idea =I don't know 意思,I have not a idea的写法是错的,正确的是I have not an idea.y意思同前一句。