in future ,in the future,for the future 区别
in future ＝ from now on 意为“今后,以后”,常指离现在较近的一段将来时间.
如：
Don't do that in future．以后别再干那种事了.
You'd better not go out alone in future．今后最好别单独外出.
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in the future ＝in time yet to come 意为“将来”,常指包括in future在内的较远的将来一段时间.如：
Who knows what will happen in the future 谁知道将来会发生什么事?
for the future常意为“为将来”.如：
It is necessary to plan for the future．对未来进行规划是必要的.