Besides,they will be bored to death and don't know what to do when they leave their phones or their phone batteries have
问题描述：
Besides,they will be bored to death and don't know what to do when they leave their phones or their phone batteries have run down because they have already been not able to adapt to the life without phone.这句话被提示语法不规范,希望大神指导一下哪里错误,怎样修改
答
将don't know改为won't know; 在their phone batteries 前面加一个when变成条件状语