gratis

The concert tickets were given out gratis to local residents.

用法提示：gratis 作副词，表示‘免费地’，修饰动词短语 given out。

This software is available gratis for non-commercial use.

用法提示：gratis 作形容词，表示‘免费的’，作表语说明软件性质。

We received a gratis sample of the new shampoo.

用法提示：gratis 作形容词，修饰名词 sample，表示‘免费的’。