这三个词都可以代替上文提到的名词 ,但在实际使用中较难掌握。例如 :one和 it都可以代替单数可数名词 ,ones和 those都可以代替复数名词。有时须带冠词 ,有时又不能带。学生在做题时往往容易出错误。为此 ,现将其用法阐述如下 ,请教于同行。　　　　　　一、one(复数 ones)one All three words can replace the above-mentioned nouns, but they are harder to grasp in practical use. For example, :one and it can replace singular countable nouns, and ones and those can replace plural nouns. Sometimes you need to bring articles and sometimes you can’t bring them. Students are often prone to making mistakes when doing questions. To this end, we will now explain its usage as follows and ask about it. One, one (plural ones) one