1.忌用one/ones替代不可数名词。遇到不可数名词往往采用“重复使用”或“省略”的方法。例如:误:I prefer white coffee to black one.正:I prefer white coffee to black/black coffee.2.忌把one与不定冠词a直接连用,但前面有形容词修饰时,其前方可加a/an。例如:误:Can you play the violin?There is a one in the room.正:Can you play the violin?There is one/a new one in the room.3.忌把one/ones与形容词性物主代词直接连用,在两者之间插入适当的形容词后方可...<br>ones必须和形容词连用。如果替代的名词时无形容词在前,则用some, any,而不用ones。<br>Have you bought any rulers? Yes,I 've bought some.