英语翻译A policeman approached Jimmy and told him he ought to have gone along a side street as Jumbo holding up traffic.(Jumbo is a baby elephant) 3,have gone 为什么用过去现在完成时?ought to go along 应该的内容为什么不用一

英语翻译A policeman approached Jimmy and told him he ought to have gone along a side street as Jumbo holding up traffic.(Jumbo is a baby elephant) 3,have gone 为什么用过去现在完成时?ought to go along 应该的内容为什么不用一
英语翻译
A policeman approached Jimmy and told him he ought to have gone along a side street as Jumbo holding up traffic.
(Jumbo is a baby elephant)
3,have gone 为什么用过去现在完成时?ought to go along 应该的内容为什么不用一般时态?
as Jumbo holding up traffic.—更正→as Jubo was holding up

英语翻译A policeman approached Jimmy and told him he ought to have gone along a side street as Jumbo holding up traffic.(Jumbo is a baby elephant) 3,have gone 为什么用过去现在完成时?ought to go along 应该的内容为什么不用一
A policeman approached Jimmy and told him he ought to have gone along a side street as Jumbo was holding up traffic.
问：1,句中as 如何理解,怎么翻译好?2,as这个介词用法,举例说明.3 ought to have gone
have gone 为什么用过去现在完成时?ought to go along 不可以吗?应该的内容为什么不用一般时态?
答：本题句出自新概念英语第二册第65课：
Last Christmas,the circus owner,Jimmy Gates,decided to take some presents to a children's hospital.Dressed up as Father Christmas and accompanied by a 'guard of honour' of six pretty girls,he set off down the main street of the city riding a baby elephant called Jumbo.He should have known that the police would never allow this sort of thing.A policeman approached Jimmy and told him he ought to have gone along a side street as Jumbo was holding up the traffic.
一个警察走过来告诉吉米,他应该走一条小路,因为江泊阻碍了交通.
1.as在这里表示原因.译作“因为”,“由于”.
2.as 在这里不是介词,是从属连词.用法很多.可从词典上摘抄.
3.ought to have gone ...不叫过去现在完成时（没有这种说法）.它相当于should have gone ...
是情态动词后用完成式,表示“本应该做某事”,是针对过去而言的.should +动词原形,表示现在或将来,如：You should study hard.你应该努力学习.（现在和将来）.如果你以前没有好好学习,这次没考好.我说：You should have studied hard.

警察走到JIMMY身边并告诉他，当小象走在大街上时，你本应该在小象的另一边，才能防止交通事故。
holding up traffic 的主语是jimmy
outht to go along 应该独自走
ought to have gone along 本应该独自走。虚拟语气。

警察走到JIMMY身边并告诉他，当小象走在大街上时，你本应该在小象的另一边，才能防止交通事故。
ought to have gone是表示虚拟语气，早该。。。，一般用来表示本来应该做 却没有做到的事情；如果用一般时态，那么表示在事情没有发生之前提出的建议。很显然，句子中所表示的意思是已经发生的事情了。文中，as怎么理解？是说在小象边上走就能够防止交通堵塞？还是因为有了这么个小象才引起了交通...

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警察走到JIMMY身边并告诉他，当小象走在大街上时，你本应该在小象的另一边，才能防止交通事故。
ought to have gone是表示虚拟语气，早该。。。，一般用来表示本来应该做 却没有做到的事情；如果用一般时态，那么表示在事情没有发生之前提出的建议。很显然，句子中所表示的意思是已经发生的事情了。

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同意 梁生文 的解答。
另外，as这里翻译成“因为”，意思是因为有了这么个小象才引起了交通堵塞

一个警察走过来告诉吉米,他应该走一条小路,因为江泊阻碍交通。
　　(巨型是一只小象)