【简介】感谢网友“雕龙文库”参与投稿，这里小编给大家分享一些，方便大家学习。
1) but表示转折，while表示对比。
Some people love cats, while others hate them.
典型例题
--- Would you like to come to dinner tonight?
--- I’d like to, ___ I’m too busy.http://yingyu.chazidian.com
A. and B. so C. as D. but
答案D。but与前面形成转折，符合语意。而表并列的and， 结果的so，原因的as都不符合句意。
2) not…but… 意思为不是……而是……
not 和but 后面的用词要遵循一致原则。
They were not the bones of an animal, but (the bones) of a human being.
