时间状语从句，条件句中，从句用一般现在时代替将来时
When,while,before,after,till,once,assoonas,solongas,bythetime,if,incase(that),unless,evenif,whether,themoment,theminute,theday,theyear,immediately HeisgoingtovisitherauntthedayhearrivesinBeijing.他一到北京，就去看他姨妈。典型例题
(1）Hesaidhe________meapresentunlessI_______indoingtheexperiment.
A.hadnotgiven;hadnotsucceeded B.wouldnotgive;succeed
C.willnotgive;succeed D.wouldnotgive;willsucceed.
答案B.在时间，条件或让步主语从句中一般不用将来时。本题有Hesaid，故为过去式。主句用将来时，故选B.此处用一般过去式代替了过去将来时。(2)表示现在已安排好的未来事项，行程等活动。
Themuseumopensattentomorrow. 博物馆明天10点开门。(实际上每天如此。)
