infuture相当于in time yet to come，意为“将来”，指较长的将来一段时间。Who knows what will happen infuture? 谁知道将来会发生什么事？I'd like to be a teacher infuture. 将来我想当一名教师。for the future表示“为将来”，在句中作定语或状语。We'd better lay up some money for the future. 我们最好为将来攒一些钱。It's necessary to plan for the future. 对未来进行规划是有必要的。
