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必修3《Grammar》PPT课件优质课下载
② However,the challenges are still great.
③ The report shows that we are making some progress but that we need to make greater efforts.
④ Although developed countries give some financial help,they need to give much more.
连词是连接______、_____、_____或_____的一种____词 (实 / 虚),在句中_____作任何成分,但大多数连词都有具体的意义和用法。
连词按性质可分为两类:
并列连词(coordinating conjunctions)
从属连词(subordinating conjunctions)
单词
短语
句子
虚
不
从句
一.but
1. 用作并列连词,用来连接并列句子或并列成分,表示强烈的对比或转折。
Eg. They rushed to the station but the train had left.
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2. 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。
Eg. I'm sorry, but I can't help you with the problem.
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他们匆匆忙忙赶到车站,但是火车已经开走了。
很抱歉,我不能帮你解决这个问题。
3. not…but… “不是……而是……”
eg. The joy of travelling is not in the scenery along the way, but in the mood when you enjoy it.
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