ill 只有名词、副词、形容词词性，非动词，所以无过去式和过去分词。

复数： ills

比较级： worse

最高级： worst

Laurence Waters visited us in place of John Trethewy who was unfortunately ill

劳伦斯·沃特斯代替不幸生病的约翰·特雷休伊来拜访我们。

You must slow down or you'll make yourself ill.

你得松松劲，不然会累病的。

He was very good to me when I was ill.

我生病时他对我关怀备至。

He's been ill a long time.

他生病很久了。