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<正> Copulas are playing an important role in English。Having a comprehensire understanding of the whole family of copulas is essential in teaching as well as using English。 This paper mainly discusses their characteristics, classification, usage and history, and furthermore some of their variants. We’d like to present this paper to those of the same occupation as ours as an aid to cope with verbs of that kind. 1.0 英语动词的词性和词义具有明显的多重性。连系动词也不例外。几乎所有的