英语改错

显示全部楼层 · 2008-11-14 01:36:12

On seeing the boy fell into the river, she sprang to her feet and went to the rescue.这句话的fell是错的，为什么？

千问 · 2008-11-14 01:36:12

男孩主动掉进水里非谓语动词要用相应的主动形式而Fell是Fall的过去式用以表行为的被动在本题即意为男孩被掉进河里不合题意...

千问 · 2008-11-14 01:36:12

fell是fall的过去式形式此句话正确应为On seeing the boy falling into the river, she sprang to her feet and went to the rescue.On seeing the boy falling into the river是作状语！...

千问 · 2008-11-14 01:36:12

see sb do sth 或是see sb doing sth fell 是过去时，不可以，应该是动词原形...