be to do 和be doing 表将来有何区别?

来源：学生作业帮编辑：大师作文网作业帮分类：英语作业时间：2024/11/10 18:01:21

解题思路：如下
解题过程：
1.“be to+动词原形”表示按计划要发生的事或征求对方意见。这种结构表示计划中约定的或按职责、义务要求必须去做的事或即将发生的动作。
　We are to have a meeting next Saturday. 下个周日我们有个会。
　The boy is to go to school tomorrow. 这个男孩明天要去上学。
　Are we to go on with this work? 我们继续干吗？
　The president is to visit China next week.总统下周来访中国。
2.be ＋doing形式：表示按计划或安排要发生的事, 含义是 “预定要……” 这一结构常用趋向动词 go, arrive, come , leave, start, stay , return 和 play , do , have , work, wear, spend , see, meet等。　　
--- When are you going off for your holiday?
你什么时候动身去度假?
--- My plane is taking off at 9:20, so I must be at the airport by 8:30.
我乘坐的飞机将于9:20分起飞, 所以我必须在8:30之前赶到机场.
最终答案：略

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