新概念二七十三课had been specially built for him 为什么用过去完成时、不用过去时?

新概念二七十三课had been specially built for him 为什么用过去完成时、不用过去时? 新概念二册34课the police__dan's bicycle 但是是had found 我想说用have been finding行吗? 新概念二册34课the police__dan's bicycle 答案是had found 我想说用have been finding行吗? 新概念英语二册45课It had been wrapped up in newspaper and it contained half the money he had lost为什么这里It had been wrapped up in newspaper要用过去完成时而这里又要用it contained half the money要用过去式?过去完成 新概念英语二册45课It had been wrapped up in newspaper and it contained half the money he had lost如果这句话换成了 It wrapped up in newspaper and it had contained half the money he had lost.这样可不可以呢?课文如下：Three mo 新概念英语二册,七十课的作文,连词部分的第二题He was Damingo Cordova.He had been a great matador in his youth .He had failed in the ring.He had taken to drinking.(...a man who ...but having...)用括号里的连词把这几个句 七十三分之四十七乘六十七加二十六乘七十三分之六十七 简便算法 新概念3 （The facts)第五课简要摘作Why had he been imprisoned?这个问题我回答不来, 英语翻译新概念二Lesson66课的一个课后题.正确答案是把need have been 换成will have to be had better的用法新概念第几课 新概念英语2册48课问题.Meanwhile,my tongue was busy searching out the hole where the tooth had been.请问这里的where引导的是什么从句where the tooth had been.后面怎么没有宾语啊? 新概念二58课作文! 新概念二第四课的 had been the tiny lanterns which had been hung in the streets the night before,are placed into the water这是新概念二第96课中的一句话,我要问的是are placed into the water中的the,在文章中没有特指是哪里的水,这里为什么要the 新概念第三册第三十六课语法分析后半部分：After having been wounded towards the end of the war,he had been sent to hospital and was separated from his unit.The hospital had been bombed and Hans had made his way back into Western Ger I've already had lunch.Have you had lunch yet?这是新概念二第4课的课后练习,这是什么时态呢?I've already had lunch.Have you had lunch yet?这是新概念二第4课的课后练习,这是什么时态呢?是现在完成时吗? 新概念第三册第三课的一句话 each of these represented a goddess and had,at one time,been painted...新概念第三册第三课的一句话each of these represented a goddess and had,at one time,been painted.为什么要用逗号短开那