A postman is a man employed to deliver letters and parcelsemployed to deliver letters and parcels在句子中作什么成分?employed前面好像省略了who is 如果是,为什么可以省略who is?

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A postman is a man employed to deliver letters and parcelsemployed to deliver letters and parcels在句子中作什么成分?employed前面好像省略了who is 如果是,为什么可以省略who is?

A postman is a man employed to deliver letters and parcelsemployed to deliver letters and parcels在句子中作什么成分?employed前面好像省略了who is 如果是,为什么可以省略who is?
A postman is a man employed to deliver letters and parcels
employed to deliver letters and parcels在句子中作什么成分?employed前面好像省略了who is 如果是,为什么可以省略who is?

A postman is a man employed to deliver letters and parcelsemployed to deliver letters and parcels在句子中作什么成分?employed前面好像省略了who is 如果是,为什么可以省略who is?
employed to deliver letters and parcels在句子中是过去分词表被动意义作man的后置定语.这是一个限制性定语从句的省略形式:who is employed to deliver letters and parcels.在省略时必须把主语who和助动词的is同时省略掉.省略who is而只保留过去分词就更简洁,大家也都能看懂.

过去分词作定语,修饰前面的a man
对的 动词是be结构的,经常可以省略,直接用分词(非谓语动词形式)而不需要从句了

后面一长串是围绕着man来描述什么是邮递员,相当于形容词,因为是一句句子,在此就是定语从句。至于加不加who is, 个人认为可加可不加,加了是对的,不加也可以,习惯使然,没有为什么。