代词常用于指代已经提到的名词。

___Pronouns are often used to refer to a noun that has already been mentioned.

'她'、'它'和'谁'都是代词的例子。

'She', 'it' and 'who' are all examples of ___pronouns.

代词是像'I'或'they'这样替代名词的词。

A ___pronoun is a word like 'I' or 'they' that replaces a noun.