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.

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.

我昨天吃了不好的东西，现在肚子不舒服。

I ate something bad yesterday and now I feel ___ill.