感官动词后加动词时什么+do什么时候+doing,什么时候跟过去分词,什么时候是恢复to的不定式

感官动词 sb do sth,含义

  1. 表示【动作全过程或动作时间较短】如:

    Let me hear you sing a song.

    I saw the man fall off the bike

  2. 表示【经常性动作】如:

    I can hear him read English almost every morning

    感官动词 sb doing sth, 含义:【动作正在发生,即部分过程】如

    I heard the girl singing a song when I passed her room.

感官动词 sb/sth done 表示【sb/sth为动作的承受者,即被动含义】如:

I found the room covered with books.

感官动词 sb do sth改成被动时,需加to. 如

I saw the man fall off the bike.----The man was seen to fall off the bike.

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