illness既是可数名词，又是不可数名词。1.患病(状态)、身体不适[U]，此时不可数，例：During his illness,John stayed indoors.约翰在生病期间足不出户。2.(某种)疾病[C]，此时可数。
illness复数形式是什么
illness的复数形式是illnesses。
illness是一个英语单词，名词，作名词时意思是“病；疾病”。
英 [ˈɪlnəs] 美 [ˈɪlnəs]
n. 疾病；（某种）病，患病期
illness例句
1The illness is usually terminal.这种病通常为不治之症。《牛津词典》
2She is still weak after her illness.她病后仍然虚弱。《牛津词典》
3The illness was diagnosed as cancer.此病诊断为癌症。《牛津词典》
4Illness had taken a heavy toll on her.疾病对她的身体造成极大的损害。《牛津词典》
5Illness had put a brake on his progress.疾病中止了他的进展。《柯林斯英汉双解大词典》
6You may find your illness hard to accept.你可能觉得难以接受自己患病。《牛津词典》
7It took her ages to get over her illness.她花了很长时间才把病治好。《牛津词典》
8His illness caused him to lose his memory.他的病使他失去了记忆。《柯林斯英汉双解大词典》
9He's up and about again after his illness.他病愈后又能起来活动了。《牛津词典》
10His illness had not stunted his creativity.疾病没有扼杀他的创造力。《牛津词典》
11Mental illness is nothing to be ashamed of.精神病并不可羞愧。《牛津词典》
12A poor diet will ultimately lead to illness.糟糕的饮食终将导致疾病。《牛津词典》
13You may find it hard to accept your illness.你可能觉得难以相信自己患病。《牛津词典》
14If untreated, the illness can become severe.若不加以治疗，病情就可能会变得很严重。《牛津词典》
15His illness has left him completely immobile.他的病使他完全丧失了活动能力。《牛津词典》