这个句子中为什么要用doesI'dlike to discuss another specialized use that's not common in egrep (althoughGNU's popular version does support it), but which is commonly found in manyother tools.括号里的那句GNU's popular version does suppo

这个句子中为什么要用doesI'dlike to discuss another specialized use that's not common in egrep (althoughGNU's popular version does support it), but which is commonly found in manyother tools.括号里的那句GNU's popular version does suppo 为什么这个句子student要用复数? 为什么internet这个单词在有的句子中要大写,有的句子中要小写呢? The printing machine are always breaking down.在这个句子中为什么要用are? 在“i wish you success in your job”这个句子中为什么success要用名词 be（原形和各种变化形式）这个单词在什么样的句子中使用,我搞不清楚为什么有的句子要用be有的句子不用be She doesn't konw whether to go or wait.这个句子中为什么要用动词不定式（to go)? he does not interrupt the people when they are talking.这个句子中为什么要用talk,不用speak? 在 He walked around stiffly carrying a walking stick 这个句子中carry为什么要用现在分词 一条关于西班牙语的问题：Ella nos da las gracias中,为什么这个句子要用da?Gracias mucho!这个句子的意思是她感谢我们的祝贺，为什么要用da？ They say they were happier before they became rich and famous.这个句子中为什么要用before,这个句子的时态是什么?为什么前面是say,而后面却是became. English is widely used in the world. 请问老师,这个句子中为什么副词要放在动词前?我认为副词应放在动词后,不知道为什么这个句子能这么用 问英语句子.How long does it take to get to school?这个句子中为什么用it they watch tv sometimes这个句子中watch要不要加es,为什么 what does he look like为什么用助动词这个句子中没有实义动词呀 All that I want is a room somewhere 这个句子中为什么用is Who knows him 请问这个句子中为什么用knows”?可以这样吗,“who know him?” Das Fahrrad gehoert dem Maodchen. 这个句子中 Maodchen前为什么用dem不用der?