新概念英语逐句解读（第三册第1课）at large（逍遥法外、在逃）例：The criminal is still at large。那名罪犯仍逍遥法外。1.Pumas are large, cat-like animals which are found in America.美洲狮是一种体形似猫的大动物，产于美洲。cat-like animals（像猫一样的动物），这个短语看似很简单，然而你会X-like这种用法吗？我们习惯说什么像什么大多用its like a .,但X-like这种用法显得特别地道，比如你跟老外介绍饺子，可以用a ravioli-like food, 像意大利方饺一样的食物，（意大利方饺在国外餐厅很普遍）这样形容，老外就能秒懂了。这个表达还可换成dog-like, I feel like leading a dog-like life.(我穷得没钱吃饭了。)文章第一句就使用了定语从句。主句：Pumas are animals.用形容词修饰 animals Pumas are large, cat-like animals.（1）进一步说明 pumas 的产地 Pumas are found in America.（2）把（1）句和（2）句合并，一个句子中只能有一个主句，另一个则为从句，修饰物用which Pumas are large, cat-like animals which are found in America.学习从句最好的方法就是自己模仿写一句类似的话，也是学习英语最实用的方法，我们现在就以熊猫为例写一句话。Pandas are black and white animals which are found in China.A puma at large 逃遁的美洲狮 （第三册第1课）3. However, asthe evidence began to accumulate, experts from the Zoo felt obliged to investigate,forthe descriptions given bypeople who claimed to have seen the puma were extraordinarily similar.可是，随着证据越来越多，动物园的专家们感觉到有必要进行一番调查，因为凡是声称见到过美洲狮的人们所描述的情况竟是出奇地相似。accumulate kju:mjlet（积累、积聚）means to gradually increase over a period of time.We have accumulated a great amount of evidence.我们已经积累了大量的证据。feel obliged to sth：must, have to: 感到必须要做某事(经常用作书面语)。I felt obliged to invite him to our wedding.我觉得有必要邀请他参加我们的婚礼。feel也有有必要做某事，应该做某事的意思。I feel I should resign.我觉得自己应该辞职。oblige: （形势、法律）迫使，如蒙将不胜感激I would be obliged if you could attend our wedding.您若能参加我们的婚礼，我将不胜感激。这句话中用了as、for两个词来引出两个状语从句，我们先将其进行拆分：主句：Experts from the Zoo felt obliged to investigate.从句1：The evidence began to accumulate。从句2：the descriptions given by people who claimed to have seen the puma were extraordinarily similar.其中，从句2中的主句：the descriptions were extraordinarily similar. 使用了过去分词given作后置定语，后置定语嵌套了一个由who引导了一个定语从句修饰people。我们来模仿写一句。However, as it became hotter and hotter, we felt obliged to buy an air-conditioner, for the existing air conditioner doesnt work.可是，随着天天越来越热，我们必须买一台空调，因为那台空调坏了。2. When reports came into London Zoo that a wild puma had been spotted forty-five miles south of London, they were not taken seriously.当伦墩动物园接到报告说，在伦敦以南45英里处发现一头野生美洲狮时，这些报告并没有受到重视。spot（看见）本课文出现了3个表示看的单词，see, observe, 这三个单词see是最普通的用法，spot最书面语。Spot means to notice something is very difficult to see or find something being looking for.Example: I failed to spot the error.我没有发现这个错误。主句：Reports were not taken seriously.主句使用了被动语态。状语从句：When reports came into London Zoo.其中，状语从句中又含同位语从句说明 reports：A wild puma had been spotted forty-five miles south of London.我们来模仿写一句。When comes news that a new type of coronavirus had been spotted in Wuhan, it was not taken seriously.当有消息说，在武汉发现了一种新型肺炎，这个消息并没有受到人们的重视。