can(not) be V-ed by …

结构︰

主语＋can（not）be ＋过去分词＋by＋宾语…。

说明︰

将主动句中的<助动词>（can，must…）照抄，后面加上 be＋过去<分词>，即构成含有<助动词>的被动句。

That lesson can not be understood by many students.
那一课无法为许多学生所理解。
The question can not be answered by many people.
这一问题无法被许多人回答。
His poor handwriting can not be read by himself.
他糟糕的笔迹无法被他本人所辨认。