I believe he can understand it after _________(talk) to him 用适当形式填空

问题描述:

I believe he can understand it after _________(talk) to him 用适当形式填空

talking.为什么啊?要不然你想写啥呢?it 后面的是从句 不是应该填talk吗?after后面省略了主语,直接用动名词就可以了