1. but 但是，如：He is very clever， but he is too careless. 他很聪明但是他太粗心了。2. yet 但是，然而，如：I've slept for 8 hours, yet I am still sleepy.3. however 然而，如：He has a lot of money.However, he lives simply.他有很多钱，然而他生活却很简朴。4. nevertheless 然而，如：He was tired. Nevertheless, he kept on working. 尽管他很疲劳，但是他依旧坚持工作。其中，but 和yet 可以互换，however和...
But 但是However然而Yet然而He has 2 apples ,but he doesn’t have any bananas;I had waited for him for 2 hours, yet he didn’t appear.The mobile phone has many advantages , however...
