表示轉折關系的連詞

表示轉折關系的連詞：主要有but, only, while, when, whereas等。

如A great deal has been accomplished, but more remains to be done.

He is riding, while his father is walking in the dust.

Why did you borrow the book when you had one?

He is ill, whereas I am only a little tired.

only表示意義轉折，衹見於非正式文躰。如You may go, only come back early.(only = but)

溫馨提示：1 有些詞或短語在句中也表示轉折意義，如still, yet, however, all the same, after all等。通常作連接性狀語。

如The problem was a little hard, yet I was able to work it out

I explained twice, still he couldn't understand.

2 while在表示轉折關系時，往往連接內容和結搆對稱的句子。

如I love strong tea while my father loves coffee.

3 both … and … not結搆和neither … nor …的區別在於前者表示部分否定，而後者表示全部否定。如Both you and I are not correct. Neither you nor I am right.