be ill还是be illness

be ill还是be illness be ill in the hospital 还是be ill in hospital 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 In spite of ___,he went on working.为什么是illness,不是ill,be ill,sick.原因写上! 是his ill 还是his illness? fall ill = be ill I was ill 还是 i am ill?I ( be ) ill.I'm staying in bed 1.He ( ) yesterday.I hope he'll be well soon.A.fall ill B.falls ill C.fell illD.fell illness ILL BE THERE怎么样 be ill at be ill in ill be fine是什么意思 fall ill和be ill什么区别? be ill in the hospital I ill be there是什么意思? Ill be right here for Kate _____(be) ill yesterday. be ill in 怎么用?