英语时间条件从句用法归纳
1. 引导条件状语从句的从属连词主要有 if, unless, as [so] long as等。如：
Unless you go at once you will be late. 如果你不马上走就会迟到。
Close the door if the noise is annoying you. 要是觉得太吵，就把门关上。
You may borrow this book as long as you promise to give it back. 只要你答应归还，你就可以把这书借走。
2. in case 也可引导条件状语从句，其意为“如果”、“万一”。如：
In case I forget, please remind me about it. 如果我忘了，请提醒我。
In case he comes, let me know. 如果他来，告诉我一声。
In case you give me leave I will start at once. 如你许可，我立即出发。
In case your husband dies, you’ll get the insurance money. 假如你的先生去世，你就可以得到这笔保险金。