An old man had a big comepany ,but his health became ____. 此空填bad还是badly？why？

An old man had a big comepany ,but his health became ____. 此空填bad还是badly？why？

填 bad

本句中的became 是系动词，后面应该跟形容词
badly 是副词，不能和系动词连用

句意是：那位老人有一个大公司，但是他的健康状况变得很糟糕。

希望对你有帮助，祝你学习进步！

bad badly意思是非常 再看看别人怎么说的。