by 不可以作为名词。
adj. 书面的，成文的文字的
v. 写（write的过去分词）
Was the note written on hotel stationery ?便条是用饭店的便笺写的吗
I must remember to write and thank her .我一定得记住去写信谢谢她。
Both girls write to each other regularly now .两个女孩现在定期通信。
They have written up his new novel .他们写文章赞扬他新出版的小说。
Writing has become his dominant interest .写作已成为他的主要兴趣。
This letter is written in a formal style .这封信以正式的文体写成。
He had painfully written out a first draft .他煞费苦心地写了初稿。
He wrote hurriedly， in scrabbling hand writing .他潦草地急急书写。
I wrote humboldt a long fan letter .我给洪堡写了一封表示崇敬的长信。
written可以作为名词吗
written不可以作名词。它是write的过去分词，它可以作形容词，后面跟名词。例如：written English written agreement 。 written作为过去分词，它与have/has/had 连用构成现在完成时和过去完成时。例如：I have written down my name. He had written two hundred words before he left.