it, the one, the ones, that ,those等代词的用法

it是代替前面提到的泛指名词。如：That is a book. It is mine.
the one是代替特指的名词，往往带修饰语。
Do you like the book? Which one? The one on the shelf with the red cover.
你喜欢那本书吗？哪本？架子上封面是红色的那本。
the ones用法一样，不过是代替复数名词而已。如：
Can you pass me the pens, the ones on your right hand? 你能把那些笔递给我吗？就是你右手边上的那几只。
that和those用来省略前面提到的名词，通常带有后置定语。如：
The weather in the north is colder than that in the south. 北方的天气比南方的冷。
People in the north are usually taller than those in the south.北方人通常比南方人高一些。