Being ill,he didn't come.

ill 是形容词,不能单独做状语.
be ill 是系动词+表语结构
非谓语动词,就是 动词 不做谓语而作句子其他成分
所以,生病必须说是 be ill
比如说这个句子,Being ill,she didn't go to school.因为生病了,她没有去上学.
be ill做状语,因为be和主句主语she之间为主动关系,be就用现在分词,把be变成being
所以就是
being ill,

第一个句 她今天患病不可以上学 第二句是 他由于工作疲倦,决定回家休息一会
两者从表达的意思上根本不同

没有用被动式.
Being ill,she stayed at home.的完整句式应该是 Because she is ill,she stayed at home.
because she 省略,是为了避免重复,直接换成 Being,后面的主语就是整个句子的主语,是主动的啊

解析如下：


of是介词,后面接动名词because of being ill/sick
of是介词,后面接名词because of (an) illness


准确解析,

@Brussels

这位网友,句首的His mother being ill,我看应该是独立主格,属于分词用法的一种.一般来说,分词开始一个句子,多半是表示原因的.这句话的意思如果用普通句来说的话,可以是这样：
Because his mother was ill,he had to stay at home.

应该用Being ill,现在分词做状语表示原因,相当于Because he was ill.
ill一个形容词单独做状语不妥.

Tom was being ill,John tool charge of his work?