【简明语法】11.22 一般现在时代替将来时

（单词翻译:单击）

时间状语从句，条件句中，从句用一般现在时代替将来时
When, while¹, before, after, till², once, as³ soon as, so long as, by the time, if, in case (that), unless⁴, even⁵ if, whether⁶, the moment, the minute, the day, the year, immediately⁷


　He is going⁸ to visit her aunt the day he arrives in Beijing. 他一到北京，就去看他姨妈。

典型例题
(1）He said⁹ he________me a present unless I_______ in doing the experiment¹⁰.
　A. had¹¹ not given¹²; had not succeeded¹⁴　　B. would¹⁵ not give; succeed¹³
　C. will not give; succeed　　　　　　 D. would not give; will succeed.
　 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He said，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。
　 The museum opens at ten tomorrow.　博物馆明天10点开门。(实际上每天如此。)