collective noun ‘文法’集合名詞(如audience,crowd,committee,cattle等)‘慣用法’集合名詞用以指整個團體時接單數動詞,用以指構成團體之個體時接復數動詞,如:The orchestra was playing. The orchestra have all gone home.集合名詞不可在同一詞句中既作單數又作復數使用,因是故:The family is determined to press its (not their) claim