感官动词
1.see, hear, listen to, watch, notice等词，后接宾语，再接省略to的动词不定式或ing形式。前者表全过程，后者表正在进行。句中有频率词时，以上的词也常跟动词原形。
注释:省略to的动词不定式--to do是动词不定式，省略了to,剩下do，其形式和动词原形是一样的，但说法不同。 see sb do sth 看到某人做了某事 see sb doing sth 看到某人在做某事 hear sb do sth 听到某人做了某事 hear sb doing sth 听到某人在做某事 以此类推...
I heard someone knocking at the door when I fell asleep. (我入睡时有人正敲门,强调当时正在敲门)
I heard someone knock at the door three times. (听到有人敲门的全过程) I often watch my classmates play volleyball after school. (此处有频率词often)
（了解）若以上词用于被动语态，须将省略的to还原： see sb do sth----sb be seen to do sth hear sb do sth----sb be seen to do sth 以此类推...
We saw him go into the restaurant. → He was seen to go into the restaurant. I hear the boy cry every day. → The boy is heard to cry every day. 2.感官动词look, sound, smell, taste, feel可当系动词，后接形容词。 He looks angry.
His explanation sounds reasonable. The cakes smell nice.
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The dishes taste delicious. The silk feels smooth.
注意：如果加介词like构成词组,则后不可接形容词，而接名词或代词： sound like 听起来像... look like 看起来像... He looks like his mother. That sounds like a good idea. It sounds like great fun. It smells like a flower. It tastes like salt.
3.如何判断look是实义动词还是感官动词? 当look理解为\看起来\时,是感官动词,后接形容词.
The naughty boys broke the window.The teacher looked angry. 当look理解为\看\或者与其它词构成词组时,是实义动词,需要用副词修饰. The teacher looked anrily at the naughty boys.
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