为（了）……起见 for “For the Sake of …”
Give the reason for a rule or precaution in formal Chinese with 为（了）……起见, as in 为了安全起见，请不要在楼梯上奔跑.
文型
为 / 为了 + 安全 / 方便 / 慎重 / 保险 / 公平 + 起见，main clause (action or rule)
Put a short abstract word between 为（了） and 起见 to say what a precaution or arrangement is for: 为安全起见 “for safety’s sake”. The main clause gives the action or the rule.
为了安全起见，请大家不要在楼梯上奔跑。
When to use 为（了）……起见 for “For the Sake of …”
为（了）……起见 means “for the sake of …”. Between 为 or 为了 and 起见 goes a short abstract word that names the reason, usually a quality: 安全 “safety”, 方便 “convenience”, 慎重 “caution”, 保险 “being on the safe side”, 公平 “fairness”, 稳妥 “reliability”. The phrase opens the sentence, and the main clause gives the precaution, rule or arrangement: 为了安全起见，请大家不要在楼梯上奔跑 “For safety’s sake, please don’t run on the stairs.” It is formal and typical of notices, announcements and careful explanations.
为慎重起见，我们决定再讨论一次。
To be careful, we have decided to discuss it once more.
为了方便起见，大家可以把作业交给班长。
For convenience, you can hand your homework to the class monitor.
为保险起见，出门前最好再检查一遍门窗。
To be on the safe side, check the doors and windows again before you go out.
为公平起见，比赛的顺序由抽签决定。
For fairness, the order of the contest is decided by drawing lots.
よくある間違い
- Put a short abstract word inside: 为安全起见, 为方便起见. For a concrete goal, use 为了 + verb phrase without 起见.
- Remember 起见 at the end: 为安全起见, not 为安全见.
- It is formal; it belongs in notices and announcements more than in casual chat.
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