Section Ⅳ　Grammar & Writing

　　表示转折关系的副词和连词

　　阅读下列句子并体会黑体部分的用法

　　1．Norway is at the top of the list，while the US is at number 7.

　　2．Although developed countries give some financial help, they need to give much more.

　　3．In the last ten years in China, 150 million people moved out of poverty.However, the challenges are still great.

　　4．The report shows that we are making some progress but that we need to make greater efforts.

　　5．You can do it however you like.

　　6．While he is in poor health, he works hard.

　　7．Young as/though he is, he knows a lot.

　　1．but

　　用作并列连词，用来连接并列句子或并列成分，表示转折，两个并列成分之间可以用逗号隔开，也可不用，但是but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.

　　这里冬天不冷，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。