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下面两个句子一正一误:①It is suggested that he be a teacher.(√);②It is surprising that he be a teacher.(×)第二句话的正确表达是It is surprising that he should be a teacher.有人认为第一句是从句中省略了情态动词should.第二句同样是省略了should,为什么就成错句了呢?这两句话在语义、句法结构上究竟有何异同?Should一词在两句中的作用是什么?Should一词作为