ing形式"独立主格结构"

动词的-ing形式作状语时，其逻辑主语一般应与句子的主语保持一致。

Being ill, he went home.

由于生病,他回家了。（= As he was very ill, he went home.）

Seating himself at the desk, he began to read a magazine.

在课桌旁坐好后，他开始看杂志。（= When he had seated himself at the desk, he began to read a magazine.）

1．表示时间的-ing形式作"独立主格结构"
Everyone being ready, the teacher began his class.
每个人都准备好后，老师开始上课。（相当于一个时间状语从句When everyone was
ready)
The chairman began the meeting , everyone being seated.
每个人坐好后，主席开始开会。（相当于一个时间状语从句after everyone was seated）

2．表示原因的-ing形式作"独立主格结构"
The boy leading the way, we had no trouble finding the strange cave.由那个男孩带路，我们没有困难就找到了那奇怪的洞。（相当于一个原因状语从句Because the boy led the way）
Many eyes watching him, he felt a bit nervous.许多眼睛看着他，他感到有点儿紧张。（相当于一个原因状语从句As many eyes were watching him）
必背：
含有being的独立主格结构。
It being National Day today，the streets are very crowded.今天是国庆节,街上很拥挤。
= As it is National Day today, the streets are very crowded.
There being no further business to discuss, we all went home.没有别的事可讨论，我们都回家了。
= As there was no further business to discuss, we all went home.

3．表示条件的-ing形式作"独立主格结构"
Time permitting, we will have a picnic next week.
时间允许的话，我们下星期将进行一次野炊。（相当于一个条件状语从句If time
permits)
My health allowing, I will work far into the night.
我的健康许可的话，我愿工作到深夜。（相当于一个条件状语从句If my health allows）

4．表示方式的-ing形式作"独立主格结构"
The students are walking in the school happily, each wearing a card in front of his chest.
学生们快乐地在学校里走着，每个人胸前都带着一张卡。（相当于一个并列分句and each wears a card in front of his chest）
The boy lay on the grass, his eyes looking at the sky.

男孩躺在草地上，眼睛看着天空。（相当于一个并列分句and his eyes were looking at the sky）

点击体验课程【https://www.spiiker.com/daily/?qd=saon】，英语让你想说就说，自信开口，挑战。Fighting！