be subject to和be subjected to的区别：
be subject to中的subject是形容词，意思很多：
1、易受某事(尤指坏事)影响；易患……
All flights are subject to delay.所有航班都可能延误。
All prices are subject to change without prior notice.所有价格如有变动，恕不另行通知。
2、取决于某事；视某事而定
The funding is subject to approval by the Board of Education. 拨款有待教育部委员会批准。
3、更多：be subject to a rule/law/penalty/tax etc
须遵守规则/须遵守法令/须缴纳罚款/须缴纳税款 等
【注意】be subject to比较正式，所以通常我们不会对小孩说：You may eat ice cream, subject to completion of your homework. 而只会说：You may eat ice cream if you finish your homework。
be subjected to中subject是动词，这个短语其实是动词短语subject to的被动式。subject to：使经受；使遭受；使服从，常用以描述令人不快的经历。
Police subjected him to hours of questioning.
警方对他进行了数小时的盘问。
变成被动语态则是：
He was subjected to hours of questions.
他被盘问数小时/他受到了数小时的盘问。
再如以下的新闻：
The two women (who are suing after they were subjected to a humiliating and invasive cavity search on a Texas roadside on Memorial Day last year) have spoken out about their ordeal.
这两名遭受了羞辱性搜身的女性……
be subjected to和be subject to有时也可以替换。
曼彻斯特机场：
From May 2013 passengers travelling on flights to UK destinations from Terminal 3 at Manchester Airport will be subject to enhanced security measures.
美联航的网站：
The bag with its contents must be subjected to inspection separate from carry-on bags.
Customers may be subjected to a secondary screening if entering the screening checkpoint with liquids, gels and/or aerosols.
澳洲和新西兰一些机场：
All departing passengers are subject to security screening prior to boarding aircraft.
再如下面这道题中：
The job applicants are subject/subjected to a high level of scrutiny.
be subject to和be subjcted to都可以用，两者的细微差别是：be subject to指”面试者必须(MUST)经过详细审核“，subject的形容词特性更多是描述一种条件或状态；而用be subjected to强调求职者是集中面试、背景调查以及评估的”直接承受者“(或带有HAVE TO的感觉)，subject的动词特性更多是强调动作。
总结：两者有时候可以互换，但有一些细微的差别(如上分析)。be subject to中更多是描述一种规定、条件、情形、状况；而描述”不情愿、被迫的经历“更常用be subjected to的结构。
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