be to +动词原形 表示命令,安排,疑问句中表示征求意见。例如:
You are to clean the window. 你要擦窗。
The President is to arrive in Rome at three oclock this afternoon. 总统今天下午三点到达罗马。
Am I to set to work? 要着手工作吗?
Is he to leave/come, too。 要他也走/来吗?
be about to +动词原形 表示即刻就要发生的动作。例如:
They are about to go out when it begins to snow. 他们正出去的时候开始下雪了.
The ship is about to sail。 船要扬帆起航了。
现在进行时可表示将来。主要是表示来,去,留,住,开始,结束 等意义的动词,如:come, end, leave, return, go, start, set out, meet, open, die, arrive。
We are going to Paris on Friday. We are leaving from London Airport. 我们星期五离开巴黎,我们从伦敦机场出发。
The poor dog is dying. 那条可怜的狗快要死了。
The tragedy is ending/beginning. 悲剧就要结束了/开始了。
4、现在完成时的用法
现在完成时强调的是现在的结果或影响,是个现在时态,不与明确表示过去某个时间的状语连用;常与 already, ever, lately, just, now, recently, today, tonight, yet, this week, this year, for+时间名词,in the last three years, in the past three years, so far ,up till now , up to the present 等包括现在在内的时间状态语连用。例如:
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