Several people fell ill.

好几个人生病了。

Lily suddenly fell ill while she was traveling.

在旅行途中莉莉突然生病了。

He fell ill and died soon after.

他病倒不久便去世了。

She fell ill soon after and did not recover.

不久后她就病倒了，而且未能痊愈。

My father fell ill and died.

我的父亲生病死了。