1. 1.不与那些已含有 again 意义的动词 (如:renew 续借;repeat重说;rewrite 重写,等)连用:请再说一遍。

正:Please repeat it. / Please say it again. 误:Please repeat it again. 但若要强调,again 本身却可以叠用:I have told you againand again not to play there. 我已再三叫你们不要在那儿玩。我已再三叫你们不要在那儿玩。-HEIGHT: 18pt; mso-char-indent-count: 2.0">有时也可见 again 与 repeat 之类的词连用,那表示的是第三次而不是第二次:Repeat it again, please. 请把它再重复一遍 (即连原来的第一遍和第二遍共计三遍)。

(from 2. again 虽然可以表示“再”、“又”,但并不是汉语中所有的“再”、“又”都能用 again 来翻译的:我们班又有两个学生入了团。正:Two more students in our class joined the League.
正:Another two students in our class joined the League.

误:Two students in our class joined the League again. (此误句若视为正句,则表示:我们班有两位同学又入了一次 团--------即第二次入团)