just as 与just like用法.（老师或者英语高手请进）
我看到这么几个例子;
That's just as it should be.just as 引导表语从句,be后面没有成分,那么just as 可以充当成分?XiaoGao began to speak before everybody else, justasthe meeting started那例如这句话,just as 引导状语从句,just as 不充当成分.这是怎么回事.

另外justlike 有类似用法吗.