有关于英语句型的问题1,The students are watching the dolphins jump.为什么J

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有关于英语句型的问题
1,The students are watching the dolphins jump.
为什么JUMP要用原形?
2,Only when your ID Card has been checked ,_____.
A.you are allowed in B,you will be allowed in
C,will you allow in D,will you be allowed in
3,New York,_____last year ,is a nice old day.
A,that i visited B,in which i visited
难道不应该用非限制性定语从句吗?为什么?
A3,A

1 分析,感官动词用法可分为VN + inf和VN -ing,因此,watch sb do sth 或watch sb doing sth,前一种表示把过程从头到尾看完或者看到某某做过某事；第二种表示看到某某正在做某事,鉴于跳跃属于瞬间动作,用第一种比较合适
但有种情况是不停地跳,那时用ing也是可行的,因此怀疑是出题者的疏忽而造成这种题目出现
2首先怀疑出题者脑残要么是印刷上的错误,only when引导状语从句时,主句习惯上部分倒装（也许出题者认为那只是习惯上而非一定）,另外涉及到时态问题,一般情况下,时间和条件状语从句的谓语动词一般会：
句中前面用了现在完成时
只有A选项的时态正确
3,句子中间有逗号,那就只能是非限制性定语从句,但出题者再次脑残地用that来作引导,that是不能用来引导非限定性从句的,这题的考点是 visit接宾语时的用法,visit是及物动词,因此B选项中的in应省略,不管怎么样,这句话都说不通,（重点在new york或重点在the old day)
你到底哪里弄来的题目啊

有关于英语句型的问题1,The students are watching the dolphins jump.为什么J He likes watching dolphins to swim and jump in the water. 关于英语句型转换的There are over ten thousand people watching the foo some students are readning the book,_____are watching the fi 1.The students are watching their chemistry teacher ____ the The dolphins are ( )interesting in the zoo. There are many students watching the volleyball match on sid the dolphins are very smart 同义句 dolphins ,the ,animal ,kind of ,are ,interesting. 1.Dolphins are the most intelligent animals. dolphins.the.animal.kind of.are.interesting. 同义句转换 The dolphins are interesting