1. 两个人称代词并列充当主语

例句：我和汤姆打算去参加聚会。

错：Tom and me are going to attend a party.

正：Tom and I are going to attend a party.

注释：因为Tom and I 在句中充当主语，所以要用主格人称代词。
 

2. 强调句型对主语进行强调

例句：是我把玻璃打碎了。

错：It was me who broke the glass.

正：It was I who broke the glass.

注释：句中的主语是"I"，只不过用了强调句型对主语进行了强调。

结语：人称代词用法比较简单，是基础语法知识，多结合人称代词表格熟练掌握人称代词的用法。避免人称代词常见使用错误。