代词包括:人称代词(I, you, he, she ,it, we ,they, you)
物主代词(名词性物主代词:mine, yours, his, hers, its, theirs, yours, ours ;形容词性物主代词:my, your, his ,her, its, their, your, our)
反身代词(myself, yourself, himself, herself, itself, themselves, yourselves, ourselves)
相互代词
指示代词(here, there, this, that, those, these)
疑问代词(what, when, who, how, whom, however, whatever...)
关系代词
不定代词(it)
以上我举例的代词是我们常用的.现在来分析一下你说的问题.
what 问的是"什么".比如这是什么?就应该说:what is this?属于疑问代词.
It是不定代词,可以指代一句话,词组,或者前面出现过的单词.
that就是那个的意思."That is my book."的意思就是:那是我的书.
one是说话双方都知道的意思,指代前面讲到过的某样东西.
温馨提示：答案为网友推荐，仅供参考