Module 2 Developing and Developed countries Section Ⅲ Grammar 连词语法图解探究发现①Norway is at the top of the list, while the US is at number 7.②Although developed countries give some financial help, they need to give much more.③In the last ten years in China, 150 million people moved out of poverty. However, the challenges are still great.④The report shows that we are making some progress but that we need to make greater efforts.⑤You can do it however you like.⑥While he is in poor health, he works hard.⑦Young as/though he is, he knows a lot.[我的发现](1)由③④⑤句可知，but 是一个连词，而 however 既可以用作副词，也可以用作连词。(2)② 句 although 引导让步状语从句，可以与 though 互换。(3)⑥ 句中 while 引导让步状语从句，意为“虽然；尽管”，而①句中 while 表示对比或相反的情况，意为“然而”。(4)⑦ 句中 as/though 引导让步状语从句，且句子采用了倒装语序，即将从句中的表语、状语或动词原形提至句首。1．but 和 however 的用法两者都意为“但是；然而”，均表示转折关系，但用法有所不同。(1)but 用作并列连词，常用来连接两个并列的句子或一个句子中的两个并列成分，表示强烈的对比、转折，两个并列成分之间可以用逗号隔开，也可以不用，但是 but 不能置于句首，并且后面不用逗号隔开。They rushed to the station but the train had left.他们匆忙赶到车站，但是火车已经开走了。It is cold in winter here, but it is not hot in summer.这里冬天很冷，但是夏天不热。[名师点津] but 作连词还可用于“I’m sorry/ Excuse me, but ...”句式中表示歉意，but 本身没有意义。I’m sorry, but I can’t help you with the problem. 很抱歉，我不能帮你解决这个问题。(2)however 用作副词时，意为“然而；但是”，用以引出令人吃惊或表示对比的话语，可以放在句首、句中或句末，但通常有逗号与主句隔开。You may be right. However, I still want to do what I planned.你可能是正确的。但是，我仍然想做我计划好的事情。Your answer is wrong, however.不过你的答案是错的。He hasn’...
