十七

The best things in life are free生活中最美好的东西是免费的呀。

Free表示免费的，有空的，空闲的，例如:

I'm very busy with school from Monday to Friday, but I have some Free time on weekends, 我周一到周五非常忙，但在周末我有空。

You can take this book with you，it's Free你可以拿走，这本书它是免费的。

Are you Free tomorrow? I want you to come to my birthday party，你明天有空吗？我想请你来参加我的生日聚会。