有没有旋元佑老师的qq群啊？求组织～～～大家一起交流心得进步得也快一点！

这个问题涉及到不确定性的问题。人都是自信的，当我说我看到、听到、尝到、感觉到一件事的时候，我基本是认为这件事情是确确实实的发生了，那为了强调这种确定性，老外采用了用原型的这样的方式，你可以理解成不管现在过去将来这个事情都是这样的。这种方式最明显的是祈使句，它也是通过这样的方式强调确定性。另外，语法上同时还规定，这类词中，help和find后可用原型也可用不定式，原因就是它们的确定性没有前面几个词那么强，所以用有不确定性的不定式，也是可以的。关于不定式的不确定性问题，你可以看我前面的另一个回贴。

谢谢邀请，我觉得老师有明确的说法，
把see ,look make 看成是Linking verb .
i see him come into the building.
s =I .see =verb（linking verb）把宾语抓出来，补语 come into the building 可否组成
he is coming into the building是可以成立的。
come into the building是 complement宾语的补语部分。
就跟 we let the kids have their fun.
S+V+C
the kids are having fun。
其实也可以用
i see him coming into the building 但是这个偏向于发生过的动作。瞬间‘
动作的一瞬间，正走进楼，但是最终有没有完成不知道
i see him come into the building最终进了这栋楼’。
另外还有瞬间动词跟常态动作，
瞬间动词就不能跟for years 持续性的状语放在一起。因为是瞬间就能完成的动作。
verb +to -infinitive
上述不是所谓的原型，而是不带 to 的不定式
就是bare -infinitive
比如 i consider her to be the best person for the job .these verbs we need to include an object before a to-inifnitive
类似的还有allow ,believe ,cause ,command ,enable ,encourage ,entitle ,force ,invite ,persuade ,show ,teach tell.
请注意 i tell her to stay here ，我要她呆在这里，跟 i tell her sth 告知她某事是不一样的，。
第二类 ，we can't include an object before a to-infinitive有些动词不定式后不能加宾语
可能因为外来语原本的语法原因。
the shop refused to accept a cheque .他们不接受支票
he threatened to report their behaviour to the principal (not He threatened them to report)
类似的动词 agree , consent decide ,fail ,hope ,pretend ,start ,volunteer.
第三类：有些动词不定式的宾语可加可不加，跟不加宾语意义不一样
I prefer to drive(I do the driving ) and i prefer u to drive (u do the drive)
其他像八廓can bear(in negative sentences and in question).hate ,help like ,love want. wish
notice that after help we can use either a to-infinitive or bare infinitive带to的不定式跟budaito的不定式都可以
i 'll help u (to ) arrange the party if u like .
第四类：后面是verb+ o +to -infinitive we have to put the word for
必须在动词后加个介词for
we waited for the taxi to come before saying goodbye.(not_waited the taxi to come)incorrect
They arranged for Jane to stay in London (not _arranged Jane to stay)
旋老师的语法书深入浅出。但是很多细节的东西包括动词的体态，没有谈及，因为我们暂时无法去台湾参加他的补习班。还是需要综合原版的英语书和海量的阅读来发现。
第五类就是：verb + (object)+ bare infinitive
some verbs are followed by a bare infinitive after an object:
she noticed him run away from the house(not noticed him to run away)错误
i made him wait outside
这类的动词几乎都是连系动词（包括感官动词
feel ,hear, observe, overhear ,see ,watch , let
感官动词当然，比如feel ,hear ,notice ,watch 后也可以加ing
但是意思不同、he came hurying up the path :to say that sb moves in the way that is described描述某人在路上）
after some years ,they came to accept her as equal (to talk about a gradual change)
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大哥，有群吗？

原形不定式，省略了to

旋元佑文法和进阶文法里有讲，有时候可以用动词原形当非谓语动词