people tend to be ill more frequently in later life.请问 to be ill _英语解答

people tend to be ill more frequently in later life.
请问 to be ill 为什么不可以使用 illness这个名词形式替代ill这个形容词形式

人气：194 ℃　时间：2019-08-20 00:07:00

解答

to be illness
means
人成为疾病
而不是人得了病

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