新概念英语2册45课问题有一句话是：Three months passed,and then one morning,San found his wallet outside his front door.我想问：1.,and then one morning,在and前面加逗号是为什么啊?2.and和then在这里干什么?应该是on o

新概念英语2册45课的问题有一句话是：Only 25 per cent a thief now!为什么不是：Only a 25 per cent thief now!请问这俩句话在语法和句意上有什么区别? 新概念英语2册54课问题有一句话是：The doorbell rang loud enough to wake the dead.能否改成：The doorbell rang loud enough to wake up the dead.我知道不能,请问为什么? 新概念英语2册45课问题有一句话是：Three months passed,and then one morning,San found his wallet outside his front door.我想问：1.,and then one morning,在and前面加逗号是为什么啊?2.and和then在这里干什么?应该是on o 新概念英语2册45课有一句话是：In time,all sam's money was paid back in this way.为什么不是：In time,sam's money was all paid back in this way. 关于新概念第三册第一课有一句话一个had用法问题新概念第三册第一课后面有一句“but where had it come from”我想问一下里面的had是翻译成什么啊?可以换成was么? 新概念英语2册51课问题有一句话是：My friend,Hugh,has always been fat,but things got so bad recently that he decided to go on a diet.请问其中的“has always been fat”能否改成was always fat在句意和语法上有什么区别 新概念英语2册35课有一句话是：He became a bus driver and he has not regretted it.我有俩个问题：1.and连接的前后应该时态已知,and前面became是过去式,后面应该用had啊!2.能否改成：He became a bus driver and he 新概念英语2册47课问题有一句话是：When I suggested that some villagers must have come in for a free dirnk,Mr.Thompson shook his head.这里应该是must have came呀!文章为什么写must have come? 新概念英语2册54课问题 The doorbell rang loud enough to wake the dead.有一句话是：The doorbell rang loud enough to wake the dead.能否改成：The doorbell rang loud enough to wake up the dead.请问为什么? 新概念英语第二册16课课文提个问题,中文是课文中的语法问题。 新概念英语3册3课语法问题有一句话是：其中有一尊雕像,她的躯体是在公元前15世纪的历史文物中发现的,而她那身首异处的脑袋却碰巧是在公元前5世纪的文物中找到的.The body of one statue was fo 新概念英语2册45课有一句话是：In time,all sam's money was paid back in this way.为什么不是：In time,sam's money was all paid back in this way.这俩个句子在句意和语法上有什么区别? 谁有新概念英语第2册 95课课文? 新概念英语2册1-24课语法有哪些? 新概念英语第2册听力 必须有63课 新概念英语第二册 40课 读后感用英文写,一句话也行.应付老师罢了. 新概念英语第二册Lesson 10 Not for jazz(第10课 不适于演奏爵士乐)中的Summary Writing(摘要写作)第1个问题：Do we own an old clavichord,or do we own a new piano?这个问题回答时的主语是用we∕you还是they或者是th 新概念英语问题,