指示代词 this, that, these, those 的一般用法和特殊用法 1) this 或 these 一般用来指时间或空间上较近的人或事；that 或 those 则指时间或空间上较远的人或事
This is an axe and that is a sickle
I have been working on the term paper these days
That Chinese student came to visit me that day
In those pre-school days, we were care-free and happy
2) 有时that 和 those 指前面讲到过的事物，this 和 these 则指下面将要讲到的事物或眼前的事
如： He was ill
That's why he didn't come to the meeting
He is not clever but he is very diligent, and that is the most important thing
The students were informed of these words: "The President will give you an audience
No one is to be absent
" What I want to emphasis is this: advertising for a bank is not easy
This will do
3) 有时为了避免重复提到过的名词，常可用that 或 those 代替
The factory's transistor's output of 1999 is double that of
