Conditional Clauses with 除非 and 否则/不然

In Chinese, the structure 除非...，否则/不然... is used to express conditional statements, similar to "unless... otherwise..." in English. This construction indicates that a certain condition must be met for a specific outcome to occur.

• 除非 (chúfēi) means "unless" and introduces the condition that must be satisfied.
• 否则 (fǒuzé) or 不然 (bùrán) means "otherwise" and introduces the consequence that will occur if the condition is not met.

Structure:

• 除非 + condition, 否则/不然 + result

Examples:

1. 除非坐飞机去，否则肯定来不及了。
2. "Unless you take a plane, you definitely won't make it in time."

3. Here, the condition is taking a plane; if this condition is not met, the result is being late.

4. 除非你仔细检查，不然太容易出错了。

5. "Unless you check carefully, it’s too easy to make mistakes."
6. In this case, the careful checking is the condition, and failing to do so leads to making mistakes.

This structure emphasizes the necessity of the condition for avoiding an undesirable outcome, making it a powerful tool in both spoken and written Chinese.