On his way home he often sees an old man sit under the tree.改错
问题描述：
On his way home he often sees an old man sit under the tree.改错
答
On his way home he often sees an old man sitting under the tree.为什么将sit 改为sitting？谢谢see sb doing sth看见某人正在做某事（看到的是部分过程）为什么将sit 改为sitting？谢谢