英语翻译为什么要用have,不直接They come here on purpose to see you.

英语翻译为什么要用have,不直接They come here on purpose to see you. 英语翻译我突然想到我们可能作了错误的决定.翻译为英语是：It struck me that we might have made the wrong decision.我想问的是为什么不直接might made 而要加上have呢 请问：some people have questioned the rationality of the students' action.怎么翻译这里为什么要用现在完成时,而不直接用questioned?哪位高手帮帮忙,谢谢. have you got a toy 为什么要用GOT,为什么不直接,HAVE YOU TOY呀我是自学英语,从小白开始, In the Britain,sales of cigarettes（ have been reduced） quite a lot in the last ten years为什么要用BEEN 不能直接用HAVE REDUCED I really have to be going.为什么要用be going而不直接说I really have to go?thxdeargood job.aha we could have had it all为什么不直接用have it all?比如we could have it all不行吗?请说出为什么. 1.It is possible that he visited Indonesia when he was in the navy （用may改写句子）He may have visited Indonesia when he was in the navy疑问：为什么改成may之后要用 have visited而不可以直接用 may visited?2.Although archaeolo 原文：Or the person might have had a very frightening experience,like being chased by an angry doy.这里的have had是什么时态?为什么?这里为什么要用现在完成时呢？直接用have可不可以？ 这是丹尼的帽子,用英语翻译,为什么丹尼的加’s而不直接加s would you have killed me?为啥要用have killed.而不直接用kill(先看图,后回答)have killed 是现在完成时吧?为什么不直接说would you kill me?而要用have killed me.我有点搞不懂唉. All the preparations for the task ____,we were ready to startA completedB completeC had been completed D have been completed 为什么选A呢?选C不行吗,直接用过去完成时? and that just may have been the best thing I have seen这里的may have done 什么作用?加了JUST和不加到底有什么区别？may have been 为什么不直接用may be 它们有什么区别？ 介词后面为什么要加the例如，in the library,为什么不直接in library?还加一个the What you had said a moment before may have reminded him of his father.What you had said a moment before may have reminded him of his father.为什么要用may have reminded ,而不直接用might remind? 英语语法have bought是什么形式?既然是过去式,为什么不直接bought呢?have bought 和have bought 分别用在什么地方? -have you finished the book?-no,i have read up to_i have read up to_the children discover the secret cave答案是where,为什么不是that?从句中并不缺成分,直接用整个从句作宾语不行吗?而且我觉得where根本不可用,他读到 I have been meeting a lot of people that way为什么不直接I have met