1) There might also have been a mistake.
也许弄错了。
2) Oh, maybe I was wrong.
哦，也许我错了。
3) You've got it wrong.
你弄错了。
4) Is there a mistake?
弄错了吧？
5) Perhaps he is ill.
也许他病了。
6) Perhaps he's ill.
他也许病了。
补充资料：也许
副词。表示可能，不肯定：天气闷热，也许会下雨｜这样处理也许不很妥当吧?
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条