C1
S + V, on condition that + S + V · In the event that + S + V, S + will + V0
on condition that / in the event that / but that
讲解
这三个条件连词属于书面语体。on condition that 表示作为许可前提的限制条件；in the event that 表示应急的情形；providing 和 assuming that 表示作为前提的假设。它们都搭配一般时态，条件分句中不用 will。 常见错误：条件分句中不用 will：on condition that you will sign ✗, on condition that you sign ✓。
例句
We will release the file on condition that you sign here.
只要你在这里签字，我们就会发放这份文件。
In the event that the system fails, call the duty engineer.
如果系统出现故障，请联系值班工程师。
Assuming that the funds arrive, work starts in May.
假设资金到位，工作将在五月开始。
He agreed, on condition that his name was withheld.
他同意了，条件是对他的姓名保密。
练习
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高效学习“S + V, on condition that + S + V · In the event that + S + V, S + will + V0”
语法点“S + V, on condition that + S + V · In the event that + S + V, S + will + V0”（on condition that / in the event that / but that）是 CEFR 5 级别的重要结构之一。要熟练运用这个结构，你需要弄清楚它的使用语境，并经常练习。
学习小贴士：把例句大声朗读多遍，培养自然的语感反应。然后试着结合自己的生活情境造句。用发音按钮听标准发音并跟着练习。
你也可以查看完整课程“”，更深入地了解相关的语法和词汇。