He was seen to cross the street when a car bumped into him.中的to cross是什么用法?改成crossing对么

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He was seen to cross the street when a car bumped into him.中的to cross是什么用法?改成crossing对么

He was seen to cross the street when a car bumped into him.中的to cross是什么用法?改成crossing对么
He was seen to cross the street when a car bumped into him.中的to cross是什么用法?改成crossing对么

He was seen to cross the street when a car bumped into him.中的to cross是什么用法?改成crossing对么
(1) cross 问题
原本的词组是see sb do sth
因为当不含to的词组改成被动时要加to,所以才会出现to cross.
如:His father made him recite the poem.
被动要加to,变成:He was made to recite the poem.
(2) 解答crossing问题
可以改成crossing,因为see还有一个词组:see sb doing sth
而doing的词组在改成被动时不需要加to,所以也可以使用crossing

被动语态句子中的主语补足语。
不对。

1 to cross在被动语态中“主语补足语”。
在主动语态中是“宾语补足语”。
2 see sb do sth------强调全过程,一次性或经常性-------被动语态:be seen to do
see sb doing------强调看见sb的时候,he正在做某事 --------被动语态:be seen doing.

see sb do sth在被动语态中省略的动词不定式要还原,改后不对,句意思看见他做了这件事,改的表示看见正在做,不太严谨。