请提供一个包含3个或更多语法错误的英文句子，并为每个错误提供一种修复方法。


错误句子：She don’t knows what to do for her birthday.
错误句子：She don’t knows what to do for her birthday.

1. 错误：don’t应该改成doesn’t，因为主语是第三人称单数。 
修正：She doesn't know what to do for her birthday.

2. 错误：知识点错误，know后面不应该加s。 
修正：She doesn't know what to do for her birthday.

3. 错误：没写完整句子，缺少关键信息。 
修正：She doesn't know what she wants to do for her birthday.