<s>Human: 确定给定的英文句子中是否有语法错误。
That company whom I used to work for last year is bankrupt now.
</s><s>Assistant: 这个英文句子有语法错误。应该把“whom”改为“that”或“which”，因为公司作为一个物体，应该用“that/which”，而“whom”用于人称。正确的句子应该是：
That company that/which I used to work for last year is bankrupt now.
</s>