and、or和but的区别：
1、and意思是‘和，另外，还有，以及' 是一种同义词地位一样都要带上的意思。
2、or 是‘或者’的意思，是一种选择。
3、but 是转折的意思，可以理解为：但是，可是，而。
拓展资料
and
1、When he returned, she and Simon had already gone
他回来时，她和西蒙已经走了。
2、Learning becomes more and more difficult as we get older
随着年龄增长，学习变得越来越难。
3、I waved goodbye and went down the stone harbour steps
我挥手告别，然后走下港口石阶。
4、All through yesterday crowds have been arriving and by midnight thousands of people packed the square.
昨天陆续有大批人到来，午夜时有几千人聚集在广场上。
or
1、'Tea or coffee?' John asked
“喝茶还是喝咖啡？”约翰问道。
2、Items like bread, milk and meat were either unavailable or could be obtained only on the black market
像面包、牛奶和肉之类的东西要么是买不到，要么就是只能去黑市买。
3、Everyone benefited from limiting their intake of tea to just three or four cups a day
每天只喝三四杯茶对身体有益。
but
1、'You said you'd stay till tomorrow.' — 'I know, Bel, but I think I would rather go back.'
“你说过你要呆到明天的。”——“我知道，贝尔，但我还是想回去。”
2、They need to recruit more people into the prison service. But another point I'd like to make is that many prisons were built in the nineteenth century.
监狱需要招募更多的工作人员。但我想补充一点，很多监狱都是在19世纪建造的。
3、Please excuse me, but there is something I must say
不好意思，但有些话我必须说。