11.22 一般現(xiàn)在時(shí)代替將來(lái)時(shí)
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時(shí)間狀語(yǔ)從句，條件句中，從句用一般現(xiàn)在時(shí)代替將來(lái)時(shí)
When, while, before, after, till, once, as soon as, so long as, by the time, if, in case (that), unless, even if, whether, the moment, the minute, the day, the year, immediately

　He is going to visit her aunt the day he arrives in Beijing. 他一到北京，就去看他姨媽。

典型例題
(1）He said he________me a present unless I_______ in doing the experiment.
　A. had not given; had not succeeded　　B. would not give; succeed
　C. will not give; succeed　　　　　　 D. would not give; will succeed.
　 答案B. 在時(shí)間，條件或讓步主語(yǔ)從句中一般不用將來(lái)時(shí)。本題有He said，故為過(guò)去式。主句用將來(lái)時(shí)，故選B. 此處用一般過(guò)去式代替了過(guò)去將來(lái)時(shí)。

(2) 表示現(xiàn)在已安排好的未來(lái)事項(xiàng)，行程等活動(dòng)。
　 The museum opens at ten tomorrow.　博物館明天10點(diǎn)開門。(實(shí)際上每天如此。)