happen的过去式和过去分词

英语改错题,我急Music is the international languare.The sung(singing)★or playing by instruments are beautiful to peope everywhere★Popular music in America is that every student(s) likes ..Students carry radios witg earphones,but(and)listen 英文改错题,每行均有一个错误,请找出来As we are in the new millennium,it is heartbreak to know that hundred and thousands of children are still seriously affected disasters all over the world.Children suffer the least in these disaster 连词成句 practice,after,guitar,I,often,the,supper. 连词成句 play after guitar i often the dinner after supper,he practices his guitar.（对after supper部分提问） 每空一词 ,After supper he practices his guitar.(对After supper 部分提问）( )( )he( )his guitar? 求问 初三物理都需要掌握哪些定律及知识要点.我才知道要好好学习.听说初三大多数是电学,新知识. 电与磁.重点知识是那些 鲁迅的风筝中哪里写出弟弟喜欢风筝 不害怕痛苦的人是坚强的,不害怕死亡的人更坚强的英语 英语中瞬间动词后不跟一段时间 可以用完成时吗? 风筝 用横线画出表现弟弟喜欢风筝的句子,说说这些蕴含着我什么样的思想感情你自己找句子文章也自己找 你能从春天发现什么 怎么写春天的我的发现? 什么是意识?——————春平23186 since后跟一个时间点,动词用过去式.for后跟一段时间.动词用完成时 翻译：The word"..."is closest in meaning to ___. Change just one letter in each word to find a familiar phrase;MALE FOOD how to find a word in emacs for example,i want to find 'equation' in the text? 地球的自转和公转与白天黑夜和一年四季是什么关系 四、如果地球绕日公转（p）而不自转（非q）,则地球上就没有白天和黑夜（非r）；然而地球上有白天和黑夜（r）；所以,地球或者不公转（非p）,或者既公转又自转.请你写出这个推理式（4分 “因为你我明白快乐的意义”英文是什么 快乐的英文意思? 英语翻译It’s right up there on their to-do list with repealing some of the Medicare benefits and reforms that are adding at least a dozen years to the fiscal health of Medicare – the single longest extension in history. Whether the weather is good or bad,they will set off as they planned.这句话后半句中的they可不可以省略啊? 地球上的白天黑夜是如何形成的?白天和黑夜的界限是什么? Yesterday and today's difference is that you still can I but is no longer my because the snake will Chatroulette 昨天还打得开 今天打开Your IP is marked for redirection because of a possible violation这个了 为什么求解答 为什么啊 David （not be）with us today ,because he (be) ill yesterday. (用所给动词的适当形式填空) 关于《狼》的文言文阅读 文言文阅读,《狼》 读了《狼》这篇文言文,你有什么体会?请简要谈谈