是固定词组be kind to 意思是善待，对……亲切，例如：

1.Be kind to old people.对老人要宽厚。

2.Would you be kind enough to close the window?请把窗子关上好吗？

3.I wonder if you'd be kind enough to call him.请你给他打个电话好吗？

4.Be kind to other people and especially to yourself.善意对待别人，特别是自己。