Question

翻译一下，谢谢！

1.我以前从未见过这种动物。
I ( ) never ( ) this kind of animal ( ).
2.他的话表明他已经忘记他过去的生活了。
What he said ( )he had forgotten his past life。
3.你做的事让他生气了。
What you did ( ).
4.他在上海展览的画很受欢迎。
His pictures ( ) in Shanghai are very popular.
5.一定要保持房间干净。
（ ）the room clean.
6.这个警察的确目睹了这场事故的发生。
The policeman ( )the accident himself.
7.不管你把什么落在教室了，我们都要帮你找到。
（ ）you ( ) in the classroom, we'll help you find it.
最好把每题的答案原因也顺带告诉我一下。

Answer 1

1 have seen ago
2 means he has forgetten the past life
3 made him annoyed
4 being on exhibition
5 Keep
6 saw
7 Whatever lost
1、过去时表示过去某时发生的动作或单纯叙述过去的事情，强调动作；现在完成时为过去发生的，强调过去的事情对现在的影响，强调的是影响。 2、过去时常与具体的时间状语连用，而现在完成时通常与模糊的时间状语连用，或无时间状语。

　　一般过去时的时间状语: 　　yesterday, last week，…ago, in1980, in October, just now, 具体的时间状语 　　共同的时间状语: 　　this morning, tonight,this April, now, once，before, already, recently，lately 　　现在完成时的时间状语 　　for, since, so far, ever, never, just, yet, till / until, up to now, in past years, always, 　　不确定的时间状语 　　3、现在完成时可表示持续到现在的动作或状态，动词一般是延续性的，如live, teach, learn, work, study, know. 　　过去时常用的非持续性动词有come, go, leave, start, die, finish, become, get married等 　　一般完成时是指： 　　现在完成的动作 　　例如：I have finished my homework . 或 My father has come from Japan . 　　或者指从过去某个时间开始，一直延续下去，可能还要继续下去 　　例如：I have lived here since 1999.或 She has lived here for ten years . 　　还有就是到达某地 　　have/has + been to 是去过了，已经回来了 　　have/has + gone to 去到了，还没回来 　　例如：My uncle has been to beijing . 　　My uncle has gone to beijing . 　　现在完成时就是已经完成的动作，对现在已经产生了影响~ 　　过去完成时 字面理解过去完成的动作或状态 　　首先判定一个句子是否为过去完成时 　　句中过去时态必不可少 　　如原句When I got to the airport , the plane had kaken off . 　　got to the airport 为过去时间 在这种情况下 　　飞机是在我到之前离开的 　　就要用过去完成时 　　用了一个had 作为过去完成时的标志 　　有的时候句中不一定要有过去时态 　　但经过仔细琢磨会发现隐藏在里边的时态

Answer 2

1 I had never seen this animal.
2 His words show that he has forgotten his past life of the
3 you do let him angry.
4 He's painting exhibition in Shanghai is very popular.
5 be sure to keep the room clean.
6 Indeed, the police witnessed the accident from happening.
7 No matter what you fell classroom, we have to help you find.