290　health, healthy和healthful

1　health 是名词，意为“健康，健康状况”。

He is in good health . 他身体健康。

Health is better than wealth . 健康胜于财富。

2　healthy 是形容词，意为“健康的”，指身体。

She looks healthy . 她看上去很健康。

He takes exercise every day to keep healthy . 他每天运动保持身体健康。

He is a healthy old man. 他是一位健康的老人。

3　healthful 是形容词，意为“有益健康的，卫生的”，多指运动、食物、气候等。

The climate near the sea is healthful . 海边的气候有益于健康。

Swimming is a healthful exercise. 游泳是一项有益健康的运动。