a letter was read is diffcult that in pencil writen用铅笔写的信很难读a letter was read is diffcult that in pencil writen 可以么

a letter was read is diffcult that in pencil writen用铅笔写的信很难读a letter was read is diffcult that in pencil writen 可以么
a letter was read is diffcult that in pencil writen
用铅笔写的信很难读
a letter was read is diffcult that in pencil writen 可以么

a letter was read is diffcult that in pencil writen用铅笔写的信很难读a letter was read is diffcult that in pencil writen 可以么
A letter that was written in pencil is difficult to read.(你少打了个to)

the letter written by pencil is difficult to read

it's difficult to read something written in pencil.

it is hard to read a letter written by pensil
a letter that are written in pensil is difficult to be read
你的说法是完全错的。不必用past tense 还有句子也排列错误。

it is hard to read a letter which was written by pencil