感官动词的用法也许是有一点复杂，但是归类总结的方法或许对同学会有帮助。
托福词汇：hear, see etc + object + verb form
1. object + infinitive or -ing form
Hear, see, watch, notice and similar verbs of perception can be followed by object + infinitive (without to) or object + -ing form.
I heard him go down the stairs.
I heard him going down the stairs. (NOT I heard him went down the stairs.)
There is often a difference of meaning. We use an infinitive after these verbs to say that we hear or see the whole of an action or event, and we use an -ing form to suggest that we hear or see an action or event in progress, going on. Compare:
----- I saw her cross the road. ( = As I looked, she crossed it from one side to the other.)
I saw her crossing the road. (= As I looked, she was crossing it - she was in the middle, on her way across)
----- I once heard him give a talk on Japanese politics.
As I walked past his room I heard him talking on the phone.
----- Watch me jump over the stream.
I like to watch people walking in the street.
----- I heard the bomb explode. (NOT I heard the bomb exploding.)
I saw the book lying on the table. (NOT I saw the book lie.....)
A progressive form can suggest repetition.
I saw her throwing stones at the other children.
After can see/hear (which refer to actions and events that are in progress), only -ing structure is used.
I could see John getting on the bus. (NOT I could see John get...)
These structures can be used after passive forms of hear and see. In this case, the infinitive has to.
He was never heard to say \'thaks you\' in his life. (NOT He was never heard say....)
Justice must not only be down; it must be seen to be done.
She was seen walking away from the accident
Passive forms of watch and notice are not used in this way.
2. possessives not used
After these verbs, possessives cannot be used with -ing forms.
I saw Mary crossing the road. (NOT I saw Mary\'s crossing the road.)
3. object + past participle
In this structure, the past participle has a passive meaning.
I heard my name repearted several times. (My name was repeated.)
Have you ever seen a television thrown through a window?
This idea of \'action or event in progress\' can be given by a progressive form (being + past participle).
As I watched the tree being cut down...
I woke up to hear the bedroom door being opened slowly.
These structures are not possible after passive forms of hear and see.
4. look at
Look at can be followed by object+ -ing form, and in American English also by Object + Infinitive
Look at him eating!
Look at him eat! (US)
>>点击查看托福词汇专题，阅读更多相关文章！
-
主流托福词汇书介绍和实用性专家逐一盘点 挑对适合自己的词汇书是关键
很多托福考生都会问哪本词汇书比较好的问题。其实选择词汇书要看它是否适合你，根据自身的情况选择一本属于自己的词汇书才能事半功倍。本文将为大家介绍和比较一下目前主流的几本托福词汇书。
- 托福词汇提升从准确认识自身单词水平开始 打好词汇基础才能冲刺托福高分
- 托福词汇量如何快速提升？5个背单词高效技巧让你也能掌握过万单词
- 如何增长基础词汇量
- 托福词汇6大高效记忆方法归纳整理 快速提升词汇量这些方法了解一下