英语题被动变主动Were they seen to gei off the bus by their teacher y

做这种题目最简单的办法就是要理解题目的意思.这样你甚至不用去管该把什么提到什么前面什么变成什么..
原句的意思是：昨天他们有没有被老师看着上车?
改为主动就是把老师弄到前面来：昨天老师有没有看着他们上车
你把它翻译过来,所以答案就是Did their teacher see them get off the bus yesterday?
或者你先把原句改为陈述句降低题目难度,
They were seen to gei off the bus by their teacher yesterday
这样再把它变为主动语气：
Their teacher see them get off the bus yesterday
再变为一般疑问句~
我想你最大的疑问应该是这个to吧
感官动词或使役动词使用省略to的动词不定式,主动语态中不带to ,但变为被动语态时,须加上to .
例：make somebody do something→somebody+ be +made to do something
see somebody do something→somebody +be +seen to do something
A girl saw my wallet drop when she passed by.→My wallet was seen to drop by a girl when she passed by.
The boss made the little boy do heavy work.→The little boy was made to do heavy work by the boss.

Did, see, them, get
这里主要是注意：在主动句中，使役动词和感官动词后的不定式不带to,但是在被动句中必须带to

Did,see to get

Did ,see to get
先改成陈述句:
They were seen to get off the bus by their teacher yesterday.
再改成主动:
Their teacher see them get off the bus yesterday.
再变成疑问:
Did their teacher see them get off the bus yesterday?
这种题目光说不行,要理解透