fall ill造句：
If you don't eat on time and go to bed on time，you will fall ill。如果再不按時吃飯，按時睡覺，你就會病倒的。
She hasn't had a rest for days，and I'm afraid she'll fall ill。她已經好幾天沒休息了，我擔心她會病倒。
The grandmother next door suddenly fell ill and soon passed away。隔壁奶奶突然病倒了，不久就去世了。
be ill造句：
She has been ill since she came home from the rain at the seaside yesterday。自從昨天在海邊淋雨之后，回家她就生病了。
She doesn't want to eat anything because she has been ill for a while。因為她這段時間生病了，所以什么東西都不想吃。
Since his illness he has been unable to do anything but lie in bed。自從他生病之后很多事情都做不了了，只能在床上躺著。