Tomorrow will be rainy.We won't go climbing.(改为if引导的复合句）→ We wouldn't go climbing if it was rainy tomorrow.这是正确答案.为什么不能改为：We won't go climbing if it be rainy tomorrow.为什么答案中用过去时那？
问题描述：
Tomorrow will be rainy.We won't go climbing.(改为if引导的复合句）
→ We wouldn't go climbing if it was rainy tomorrow.
这是正确答案.
为什么不能改为：
We won't go climbing if it be rainy tomorrow.
为什么答案中用过去时那？
答
正确答案为虚拟语气
还可以改为：We won't go climbing if it is rainy tomorrow.
if引导条件状语从句，主句用一般将来时，从句用一般现在时。
用虚拟语气表达此句时，主从句要做出相应的变化。
答
We won't go climbing if it is rainy tomorrow.
答
可以这样改