英语高手请进 代词one, ones 与that的区别

1.that:比较句中替代词，不可数名词that替

2.it:替代若系本身物，it 代单数 they 代复数
指代动物、物品，可以直接用于句中。
it is hers/they are theirs
指代前面的一句话等，放在前面一句话之后紧接着的句子中，做主语用

3.有的时候通用：that/it is great!

4.one 和ones 指代前面已经说过的物品，放在前面一句话之后紧接着的句子中，做宾语用。one 指代单数物品，ones 指代复数物品
one泛指或者指代前句的each已经说明是单数形式
The apples here are very small, this is the biggest one.
ones (those后+名词复数）
girls in this class are beautiful, those ones are the hottest!

5.the one(特指,后面为定语从句)

The streets in Beijing are wider than “those” in Donguan
the streets是泛指街道 为不是特指一条街道
所以用those

The streets in Beijing are wider than “those” in Donguan
是对的。