引导词as long as in case引导的
条件状语从句符合"主将从现"原则。
1. as long as 只要 。是连词，引导条件状语从句，符合"主将从现"原则。
如：
1).As long as I am free, I will help you.
只要我有空，我都会帮助你。
2). I'm not particular how you do it as long as it gets done.
只要把它完成了，你怎么做我并不计较。
2.in case 万一。是连词，引导条件状语从句，符合"主将从现"原则。
如：
I'll take a hat with me in case the sun is very hot.
倘若太阳很利害，我会随身带上一顶帽子。
拓展
1. as long as 的其它用法 ：
1).This stick is as long as that one . （als long as ..与……一样长）
这条棍子和那条一样长。
2 ) As long as you are going, I'll go too. （as long as 既然）
既然你要去,那么我也去.
2. in case 后跟of +名词/代词
如：
1). We have an auxiliary generator in case of power cuts.
我们有一台万一断电时使用的备用发电机。
2). In case of rain, they can't go.
万一下雨，他们就不能去了。