afraid后加不定词、和动名词两者都可以，但意思不一样。be afraid to do，不敢，胆怯去做某事，是主观上的原因不去做，意为“怕”；be afraid of doing，担心出现doing的状况、结果；

扩展资料

例句：

She was afraid to open the door.

她不敢开门。

She stayed at home, afraid to show her face.

她待在家里，不敢露面。

I was afraid to open the door lest he should follow me.

我当时害怕打开那个门惟恐他跟踪我。

She was afraid to meet my eye.

她不敢正眼看我。