省略主语:
当并列是成分是由同一个主语发出,并列连接词后可以省略主语:
She case forward and shook hands with me
省略谓语 :
当连接词后面两个分句中的谓语动词相同时候,后一分局中谓语可以省略
I'd like to come but i can't
省略其他成分:
The boy wanted to bring his chest to the shopping center alone, but his mother told him not to
如果从句的主语和主句的主语一致,且从句的谓语含有be动词的某种形式,可同事省略从句的主语和be 动词的某种形式
when while 引导的时间状语从句:
Be confident of success when (you are) running the company
If , unless , once 引导的条件状语从句:
If (it is ) properly educated, child will become confident.
Once (you are) caught cheating in an exam, you will be punished
Though
参考
https://zhuanlan.zhihu.com/p/67310478