sick的名词怎样写（如何辨别单词sick与ill）

sick 生病的；有病的

①作"生病的"讲时可作表语和定语。

②在句中作表语时be sick=be ill.

③feel sick感到恶心

④be sick of厌倦......

ill生病的；有病的

①作"生病的"讲时只作表语，不作定语。

②ill的比较级和最高级分别为worse,worst.

③ill的名词形式为illness.

e.g. Mary can't come today because she is sick/ill.

玛丽生病了，所以今天不能来了。

I have to look after my sick grandpa.

我得照顾生病的爷爷。（此时不能用ill)

I want to get off the bus. I feel a little sick.

我想下车，我感到有点恶心。

I am sick of rope skipping.

我厌倦了跳绳。

－Why doesn't Lucy go to school today?

－She has to take care of her________father.

A.sick

B.ill

C.illness

D.healthy

解析：考查词义辨析。作"生病的"讲时，sick 可作定语修饰名词，ill只能作表语。illness为名词，healthy 可作定语，根据答句句意"她得照顾生病的父亲"可知答案为A。