他看起来很痛苦，需要马上去看医生。

He looks very ___ill and needs to see a doctor immediately.

她因为睡得太晚，第二天感觉特别不舒服。

She felt ___ill the next day because she stayed up too late.

我妹妹今天生病了，所以没去上学。

My sister is ___ill today, so she didn't go to school.