unless条件状语从句用法解析：

1.unless除非，如果不 = if...not
unless引导的条件状语从句要用一般现在时表将来

They won't come unless you say sorry. 
= If you don't say sorry, they won't come.
除非你道歉，要不然他们不来。
（如果你不道歉，他们就不来。）


You won't make progress unless you work hard. 
= If you don't work hard, you won't make progress.
除非你努力工作，否则你不会进步。

You will be late for school unless you get up early. 
= You will be late for school if you don't get up early.
除非你早起，要不然你上学会迟到的。