宾格
有两种情况:
(1)see sb.do sth.
(2)see sb.doing sth.
第一种用于看到全过程
例句：
I saw her push the boulder down on you.我看见她将巨⽯推下砸向你
I saw him help an old man cross the street.我看见他帮一个老人过街.
第二种指看到在进行的动作，例如:I saw him playing baskitball yesterday.我昨天看到他在打篮球．
类似还有watch，notice，hear，listen to，feel，look at
后接ing与本相外，还可接在过去分词，即see sb. done看见或人被……
如. Seeing her son taken good care of， the mother was very happy.
类似词汇还有notice，hear等表具体感观的动词
