假如...，（就）... for “Suppose” and “If”
假如 means “if, suppose” and is a little more formal than 如果; it is good for imagined situations like 假如你是校长.
句型
假如 + condition（的话），（subject +）就 + result
假如 introduces a supposed or imagined condition, and the second clause gives the result, often with 就 after its subject. It works like 如果 but sounds a little more formal, and it is especially common for imagining unreal situations: 假如你是校长，你会怎么做？
假如明天下雨，运动会就改到下周。
When to use 假如...，（就）... for “Suppose” and “If”
假如 starts the first clause and gives the condition. The second clause gives the result; 就 goes after the subject of that clause and before the verb: 假如明天下雨，运动会就改到下周. 就 can be left out, especially when the result is a question or uses 会, 要 or 请. 的话 can be added at the end of the condition: 假如时间来得及的话.
假如我有一个月的假期，我就去各地旅行。
If I had a month’s holiday, I would travel all over the place.
假如你是校长，你会怎么做？
If you were the principal, what would you do?
假如没有手机，我们的生活会是什么样子？
Suppose there were no mobile phones: what would our lives be like?
假如你有什么困难，就告诉我们。
If you have any difficulties, just tell us.
常见误区
- Put 就 after the subject of the result clause: 假如明天下雨，我们就在家, not 就我们在家.
- 假如 is slightly formal; in casual talk 要是 or 如果 is more natural.
- For a bad event you hope won’t happen, 万一 fits better than 假如.
针对性练习
先练这个句式，再继续往下看。