你好,一般情况下,被动语态中的助动词 be 都不可以省略,只有在过去分词短语中才台省略。第一个例子中的 is performed 属于被动语态,充当句子的谓语,其中的助动词 is 是不能省略的;第二个例子中的 affected by tea culture 实际上是一个过去分词短语,充当名词 country 的定语;过去分词短语表被动的含义,但过去分词前面不带助动词 be。此过去分词也可以转换成一个定语从句:The European country that is most affected by tea culture.注意,过去分词短语转换成从句之后,过去分词前面必须加上助动词 be。另外,The European country most ( affected ) by tea culture 不是一个句子,只是一个短语而已,完整的句子应该是TheUK, however, istheEuropeancountrymost affected byteaculture.又如:1. My new bike was stolen by a thief yesteray.其中的 was stolen(助动词 was + 过去分词)属于被动语态,充当句子的谓语,助动词 was 不能省略。2. The western children were able to watch a new movie program called Monkey in 1979.其中的 called Monkey 属于过去分词短语,过去分词 called 前面不带助动词 be。原句 =The western children were able to watch a new movie program called Monkey in 1979.