实际上这两个句子都不对。正确的语序应该是“别老为以后的事情操心”。 别 don't 老 always 为 for 以后的 future 事情 matters 操心 worry about 这个句子用了一个“为”字结构。它的基本构成形式是：为+object+verb. 所表示的含义是：do sth. for the object. There is often a shift of characters' order in specific structures. So the right order of the fundamental framework of your sentence given fitted in "为" structure should be "为+事情(object)+操心(worry)". Then add an adjective in front of the object and transform it into an imperative sentence then you'll get "别为以后的事情操心". The original order of this sentence without "为" structure should be "别老操心以后的事情".

the rignt grammar is别老为以后的事情操心

别老为以后的事情操心。