> 指示代詞：標識人或事物的代詞，用來代替前面已經提到過的名詞 `this這個 these這些 that那個 those那些` ``` This is his book. Those apples were his. ``` > 不定代詞：指代不確定的人或事物。 `one一個 the other另外一個 some一些 any一些 each每一個 something某物 nothing什么都沒有` ``` No one knows where he is. Some of the boys want to go to Shanghai,but the others wnat to go to Xi'an. Each of the students has got a book. ```