Every man is not polite, and all are not born gentlemen.

　　38. may as well notas結構，此結構可譯為與其不如不。

　　One may as well not know a thing at all as know it but imperfectly.

　　39. have only to do結構，此結構表示只須就能的意思。

　　We have only to turn to that extraordinary discovery made by Edison to see the significance of it.

　　40. not unless句型

　　No increase in output can be expected unless a new assembly line is installed.

　　41. betterthan句型

　　Better my life should be ended by their hate, than that hated life should be prolonged to live without your love.

　　42. as it were是一個非常常用的插入語，意思是好象，可以說等。

　　Apiece of iron near a magnet, though apparently separate from it , feels, as it were, the threads of this attachment.