从以下的句子中，找出语法错误并进行修正。
- "My boss he is always late for meetings."
- "She don't like pizza."
- "The cat chased it's tail."
- "My boss he is always late for meetings." -> "My boss is always late for meetings."
- "She don't like pizza." -> "She doesn't like pizza."
- "The cat chased it's tail." -> "The cat chased its tail." (no apostrophe in "its" when it is a possessive pronoun)