write的名词形式是？

　　双语例句

　　1.I can't read your writing.

　　你的.字我认不出来。

　　2.Maggie's writing was virtually indecipherable.

　　玛吉的字迹几乎无法辨认。

　　3.Writing had not been invented as yet.

　　书写当时还没有被创造出来。