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问题: 感官动词如:see.,watch,hear在什么情况下用省略to 的不定式或动名词?

解答:

它们常用结构是: see sb/sth do sth(省略to), see sb/sth doing(现在分词,不是动名词),see sb/sth done(过去分词).当see的宾语与后面的动词是主动关系,用do后doing.(doing 表示动作在进行,do 表示动作已经过去,或常发生).当see的宾语与后面的动词是被动关系,用done.如: 1. I saw him go by just now. 2.I saw him sitting under the tree when I went by. 3. I saw that stone carried away by four men.
see,watch,have,notice,observe, feel,hear等用法与see相同.