be+to do ”的用法知多少

    在英语里,“ be + to do ”结构可用来表示将来时间,它的具体用法如下:
   1. 表示“按计划、安排(要做某事)”。例如:react to的用法
   We are to meet at the school gate. (我们将在校门口碰头。)
   They are to go travelling in August. (他们计划八月份去旅游。)
   2. 表示“命令”。例如:
   You are to be back before five o'clock. (你须在 5 点钟以前回来。)
   The room is to be locked. (这个房间要上锁。)
   3. 表示“职责”。例如:
   I am to inform you that the meeting will be held in Wuhan. (我谨通知你会议将在武汉召开。)
   He is to design a new machine. (他将设计一台新机器。)
   4. 表示“目的”。例如:
   The prize was to honour him for his great discoveries. (这项奖励是为了对他的重大发现而表示的敬意。)
   5. 表示“用途”。例如:
   A pen is to write with. (钢笔是用来写字的。)
   6. 表示“命中注定”。例如:
   They were never to meet again. (他们注定以后永远不会再见面了。)
   7. 表示“应该做(某事)”。例如:
   What are we to do next? (我们下一步应该怎么办?)
   What is to be done when something gets into your eyes? (如果你眼睛里进了东西, 该怎么办?)
   8. 表示“可能性”。例如:
   It's eleven o'clock now. He is to get to Mike's house. (现在 11 点了,可能他已经到达迈克的家了。)
   Let's see who is to win the game. (让我们看看谁会赢得这场比赛。)
   9. 表示“征求对方的意见”。例如:
   Am I to go on with the work? (这项工作我是不是接着干下去?)
   When are they to hand in their plan?    (他们的计划什么时候交上来?)