the little girl was very afraid big dog in frong of her

问题描述:

the little girl was very afraid big dog in frong of her
中间为什么应该填to see 而不填of seeing

这里表示的是“害怕见到”,表示害怕某事用be afraid of doing sth
比较:
be afraid to do sth 表示“不敢做某事” 怕而不敢为