这几个句子语法对吗,还有求这几个句子的用法

Hello,
1.The person having been told is our monitor.此处having been told 作定语修饰person,person 是tell 的宾语,所以person被告诉,并且强调动作已经完成.
2.He bought a pen made in china last week.此处 made in China 做定语,修饰pen ,此处省略了that is ,pen和make 是被动关系.
3.There are still some questions left.此处,问题和留下是被动的关系,问题是被留下的.此处省略了that is ,原句应该是There are still some questions that are left.
4.With that work done,They all decide to go on a trip to the U.S .此处,with +宾语+宾语补足语,work和do 是动宾关系,因此,work 是被做的,根据句意,他们打算去旅行,说明工作做完了,done表示被动、完成.
综上,此处考察了对定语从句和后置修饰修饰语以及非谓语动词的用法,我建议你去看看相关的语法书,或者向老师寻求帮助,那样更具体和系统些.