请问下面3道题为什么要那样选 1.our teacher will return by the time school

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/15 19:36:51

请问下面3道题为什么要那样选 1.our teacher will return by the time school begins.为什么要选begins
(will begin,began,is beginning,begins)
2.our classes___begin__at 7:30 tomorrow morning.(begin,begins,is beginning,were beginning)
3.the train_leaves__at five this afternoon.(leave,leaving,leaves,are leaving)

在英语语法中：当句子表示将来发生的事情的一种预测或是陈述时,时间状语用一般现在时表示.
虽然有tomorrow morning表示将来的时间,但是句子表达的是经常性的动作,现在如此,过去如此,将来也如此.同第二题一样

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