新概念二中课文中的疑惑have just received a letter from my school,informing me that my former headmaster will be retiring next week.informing 是现在分词吗?如果是,与前面一句的主语不同啊,前一句的主语是我,而后一

新概念二中课文中的疑惑have just received a letter from my school,informing me that my former headmaster will be retiring next week.informing 是现在分词吗?如果是,与前面一句的主语不同啊,前一句的主语是我,而后一 新概念英语 二册 56课文 新概念二的背课文速记法 新概念英语二册39课文全部内容 新概念英语二64课课文 新概念英语二 第五课文的中文翻译 急需新概念(二)23课课文 新概念二24~28课课文.快. 新概念二 第50课课文 who 有新概念二19课文? I have just received a letter from my brother.这句话中 just和 have能换位置吗?换了意思一样吗?新概念英语二册第四课练习题I just ______ (receive) a letter from my brother, Tim. He is in Australia. He ______ (be) there for si 英语did you have a crash?可以说成have you had a crash?如题,可以说成完成时态吗?为什么?新概念英语中的课文，我就是想知道crash能用作完成时态中吗？ 新概念英语第二册课文中的一道题i have just received a letter from my school,informing me that my former headmaster will be retiring next week.informing 是现在分词吗?如果是,与前面一句的主语不同啊,前一句的主语是 关于新概念二课文中某个语法的不理解新概念二中的65课有这么一句,He set off down the main street of the city riding a bay elephant called Jumbo.这个地方为什么用riding呢,是动名词还是现在分词,越详细越好, 直接引语中的引号应该是单引号还是双引号,新概念二中怎么都是单引号呢 新概念英语二册课文（2-5课） 新概念英语二册33课课文 急!谢谢 新概念英语二第7篇课文忘带书了