查人人中国名人网甲状腺癌一定要手术吗:英语问题 thanks
来源：百度文库 编辑：查人人中国名人网 时间：2024/04/28 17:28:14
The missing boys were last seen______near the river.
A.playing B.to be playing C.play D.to play
答案是B,为什么不选A，有be seen doing 这个结构呀！
A.playing B.to be playing C.play D.to play
答案是B,为什么不选A，有be seen doing 这个结构呀！
A也可以的
摘自美国一失踪少年寻找网站www.childseeknetwork.com：
Daniel, Anibal, and Jesstin were last seen playing in a yard on June 22, 2005 at approximately 5:00 pm
答案A也可以的。B也可以。
不知道。
我的书上的答案是A.
see sb. doing sth.
此句为被动语态,若主动语态,则有see to do sth &see doing sth.但在被动语态seen后面要加to.因此要选B
感官动词后面带不带to的不定式,变成被动要还原,但是see sb.doing sth.表示看到动作正在进行 a,b 均可
She was heard ________ an English song.
A. to sing B. sing
C. sang D. to be sang
be seen to do 是固定用法