填空In summer，you can see plenty of butterflies ---- in garden。 a.to fly b.flying c.flies d.fly

填空In summer，you can see plenty of butterflies ---- in garden。 a.to fly b.flying c.flies d.fly

flying 选b
一感觉(feel) 二听(listen to, hear) 三让（have，make，let） 四看（look at, see, watch, notice)
后边跟复合宾语的时候，如表示经常性的动作或者是看见时已经完成的动作用动词原形，如果表示的正在进行，则必须用doing的形式。
We saw him enter your office while you were away.
yesterday when I was walking on the street , I saw a foreigner dancing in the middle of the street.
当这些动词后跟sb. +动词原形时变被动句必须把to加上
He is seen to draw a picture.
Tom was made to work 10 hours a day.

fly

B

b.flying see sb doing 看见某人正在做

选B，see sb/sth doing

1. see sb do sth 看见某人做过某事，
I often see him draw a picture.
2. see sb doing sth 看见某人正在做某事。
When I pass the window I see him drawing a picture.
3. be seen to do ,用于被动语态还原to
He is seen to draw a picture.
这是see的固定用法，所以应该选b