This是这个的意思.列：this is my book.

比如两个人对话,对于两者都知道的东西一般是用The的.而This是近指,就是说这个.The是冠词,ad. [用于比较级,最高级前]

art. 这(那),这(那)些

用于已知的事物,地址,东西,等等名词前.例句与用法:

The是特指,This是近指.

The more he has, the more he wants.

他得到越多,想要的也越多.

2. Please close the window.

请把窗户关上.

3. Turn to the left and you will find the post.

向左转,你会找到邮局的.

4. We must protect the earth.

我们必须保护地球.

5. Of all her children, Mary is the cleverest.

她的孩子中,玛丽最聪明.

6. Is it necessary for me to attend the meeting?

我真的必须参加这个会议吗?

7. I reached the gate that opened onto the lake.

我走到临湖而开的那扇门前.

8. I haven't the slightest idea what you are talking about.

我一点也不明白你在说些什么.