是加ier.

比較級： healthier

adj. 更健康（healthy的比較級）

I wish our kids would snack on some healthierfoods.

我真希望我們的孩子能吃些健康的零食。

Steaming your food is healthier than frying it.

把食物蒸著吃比炸著吃要健康。

Steamed food is much healthier than fried food.

蒸的食物比油炸的健康多了。

The doctor recommended that I eat healthierfood.

醫生建議我吃更健康的食物。

She thinks it is healthier to be a vegetarian.

她覺得素食主義者更健康。