collective noun : 1 用于復數的詞people capital police ....2用于單數的詞 leafage equipment furniture 3用于單數或復數的詞audience commitee class crew family government (具體看它是否指的成員）但特例：a people 一組人 the commitee \ board of 后跟 謂單 。
coordinate words: 1必須合起來用的例如刀叉 ham and eggs 用謂單2 and連接的every many a each 用謂單3 or either or neither or 就近原則