过去完成时的,(英语高手进)

I have suffered poverty

和I suffered poverty的区别,这里过去试和现在完成时的区别,一定要用这里的句子来做个区别,如果你举个例子类似的句子,来区别一下,谢谢帮忙

汗说了跟没说一样,我知道语法,但其中的过去试和现在完成时都有过去的意思,但我不知道在什么时候上用,如果现在完成时有时间状语的时候我就能区分,但没有时间状语的时候,我就难以区分,在说一下现在完成时有强调结果之意思,如i have been go to great wall 和i gone to great wall都有去过长城的意思,前者强调我去过了长城而且熟习那里,第二个只是说过我去过长城但不见得熟习,但看到以上的那句话就是 have suffered poverty 和I suffered poverty都表示过去很穷,但这里前者强调什么,?在这里的例句上我就很疑惑,希望有明白的人告诉下

现在完成时和过去时其实都是在说以前曾经发生的事情,只是现在完成时除了陈述过去的事实之外还侧重过去的事情都现在的影响.以你的题目为例,I have suffered poverty. 我已经遭受过贫困了.(隐含着我过去遭受过贫困,所以我现在怎么怎么样).I suffered poverty.我过去遭受过贫困，(这个只是在陈述一个事实,我过去贫困,但不强调这个跟现在的关系).

过去完成时 1） 概念：表示过去的过去 其构成是主语+had +过去分词。 那时以前 那时 现在 2） 用法 a. 在told, said, knew, heard, thought等动词后的宾语从句。 she said (that) she had never been to paris. b. 状语从句 在过去不同时间发生的两个动作中，发生在先，用过去完成时；发生在后，用一般过去时。 when the police arrived, the thieves had run away. c. 表示意向的动词，如hope, wish, expect, think, intend, mean, suppose等，用过去完成时表示"原本……，未能……" we had hoped that you would come, but you didn't. 3) 过去完成时的时间状语before, by, until , when, after, once, as soon as。 he said that he had learned some english before. by the time he was twelve, edison had begun to make a living by himself. tom was disappointed that most of the guests had left when he arrived at the party. 典型例题 the students ___ busily when miss brown went to get a book she ___ in the office. a. had written, left b. were writing, has left c. had written, had left d. were writing, had left 答案:d. "把书忘在办公室"发生在"去取书"这一过去的动作之前，因此"忘了书"这一动作发生在过去的过去，用过去完成时。句中when表示的是时间的一点，表示在"同学们正忙于……"这一背景下，when所引导的动作发生。因此 前一句应用过去进行时。 注意： had no ……when 还没等…… 就…… had no soone……than 刚…… 就…… he had no sooner bought the car than he sold it. 过去完成时的用法（1） 表示过去某一时刻之前已经完成的动作，常与由by，before引导的时间状语连用。 we had learned 5000 words by the end of last month. 到上个月底为止我已经学了五千个单词。 i had finished the composition before supper. 晚饭前我就已经把作文写完了。 过去完成时的用法（2） 表示过去某一动作之前已经完成的动作，常与由when，before等连词引导的时间状语从句连用。 when i woke up it had already stopped raining. 我醒来的时候雨就已经停了。 i hadn't learned any english before i came here. 我来这儿之前没学过英语。 常用于引导这类状语从句的连词有：when当……的时候，as soon as一…就， before在……之前，after在……之后，until直到，等。 过去完成时的用法（3） 用于宾语从句或间接引语中 i wondered who had taken the umbrella without permission. 我想知道谁不经允许就把雨伞拿去。 he told me that he had passed the exam. 他告诉我他已通过考试。 过去完成时的用法（4） 某些动词的过去完成时表示一个打算要做却没有做成的事。 i had intended to come over to see you last night, but someone called and i couldn't get away. 昨晚我本打算来看你，但有人来找，脱不开身。 we had hoped to catch the early bus, but found it was gone. 我们本希望搭早班车，却发现车已开了。 这类动词有：intend打算，hope希望，plan计划，mean预定，want想要， think想要，等。 过去完成时的用法（5） 用于表示与过去事实相反的虚拟条件从句中 if you had come yesterday, you would have met him. 如果你昨天来的话，你就已经见到他的面了。 she would have come if she hadn’t been so busy. 要不是这么忙的话，她就已经来了。