The sign on the birds' cage means we should keep quiet 否定句

问题描述:

The sign on the birds' cage means we should keep quiet 否定句

The sign on the birds' cage doesn't mean we should keep quiet.

鸟笼子上的标志意思是我们应保持安静

有2种否定方式:
一是否定主句
The sign on the birds' cage doesn’tmean we should keep quiet
二是否定从句:
The sign on the birds' cage means we should not keep quiet
第一种更符合要求