has been done 与had been done要怎么用啊

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• has been done 与had been done要怎么用啊
• 这些现在完成时句子对现在的影响是什么!都说完成时是过去发生的动作或状态对现在的影响,但是我看到好多句子都觉得对现在没有什么影响请帮我说下这些句子对现在的影响是什么!1.I have done something in a disabled children's home.2.Have you ever taken part in any activities to help children?3.He has seen the changes in beijing himself.4.I have just call you.还有那个have been to表示去过某地已经回来,但是我觉得它应该是用一般过去时来表达啊.比如I have been to an English traning school.这个句子我觉得应该用一般过去时来表达：I went to an English traning school.现在完成时困扰我很久了!
• 关于IF条件句if条件句中did would do 表与现在事实相反的猜测had done would have done 表与过去事实相反的猜测那么 did would be doing 与 had done would have been doing表示什么呢再顺带问一个问题 my favoutite animal is pandas 还是 my favourite animals are pandas 还是 my favourite animal are pandas还有两个不可数名词谓语动词用什么 如 milk and bread is/are my breakfast
• All —— on the weather（depend）all不是不定代词吗,谓语动词用?Sunday is the first day of ——week （填a或the)一定要准确答案啊有疑问 不定代词做主语谓语动词单数啊Something has been done about the problemthe也可以啊The elephant is the biggest animal on landAll are here.All is all right.第一句指人，谓语用复数。第二句指事，谓语用单数。你非常确定吗，一定要百分百准确呀
• 开头的句子A survey of students safety has been开头的句子A survey of students safety has been done recently Here is the result结尾句子是love our own life because everyone only has life once 的英语作文要怎么写
• 6 help!help!关于英语时态选择题,在此跪求大家了,谢谢谢谢谢谢谢!6.The little boy is dirty from head to foot because he ( ) in the mud all morning.A.has played B.is playing C.has been playing D.was playing答案:CQ:为什么不用过去进行时态表示小男孩整个早上都在玩,那么对于这到题现在完成进行时态has been playing和过去进行时态was playing 有什么区别,用现在完成时态has played 行不喃.又和前两个时态比较喃?现在完成时have done分为两种 1.动作未完成 2.动作已完成 所以理论说 has played 可以表示现在还在玩啊~
• 非谓语动词做状语非谓语动词让我觉得有点晕,是不是有以下几种啊-doing=非谓语动词与主语动词同时发生-done=-to do=表将来-having done=非谓语动词与主语动词有明显的前后发生关系-having been done=非谓语动词与主语动词有明显的前后发生关系,但是被动-being done有没有-had done?having done与done的区别是?与being done的区别是?
• 汉译英:这些年来你一直在干什么? 书上翻译是：What have you been doing all these years?请问：1.这句话明明是过去完成时,为什么翻译用过去完成进行时?你过去一直在干什么,只是过去啊,难道你将来要干什么也包含了吗?可以改成：what have you done all these years?吗? 2.句子中的all有什么用?可以直接去掉吗?
• 英语中,插入语定语从句和双层定语从句区别的问题.希望有人能解答以下的疑问.英语中定语从句插入语问题：如此句：they pointed out the damage which they supposed had been done by last night's storm这里的插入语they supposed一插入,岂不是多了一个谓语动词?这句话可以怎么改写呢?还有双层定语从句中：He is the only person that we know who speaks so many foreign languages.岂不是可以看做一个插入语定语从句把,如who去掉.那么第一句不是就可以改写成：they pointed out the damage which they supposed that had been done by last night's storm了吗?而这就是双层定语从句啊!可书上说这样是错的.
• 非谓语动词用法to have done/having done/to have been done/having been done都有什么意思,都怎么用啊,它们有什么区别吗?
• 这是一道选择题：___ work has been done to improve the people's living standard.A.Many B.A great many C.A large number of D.A great deal of我选择的是C,可正确答案是D.
• 1）Help with each other是英式用法还是美式用法?2）是help each other 还是help with each other