If we are to be there before ten, we’ll have to go now.
如果我们想在十点前到,我们现在就得走。
④ 用于第一人称疑问句,表示征求对方意见。例如:
Am I to go on with the work ? 要我继续这项工作吗?
What are we to do next ? 我们下一步该怎么办?
⑤ 在与be 连用的结构中,see, find, congratulate 的不定式被动式有特殊的用法。例如:
The news is to be found in the evening paper. 这条消息可以在晚报上见到。
He is nowhere to be seen. 在哪里也见不到他。
You are to be congratulated. 应当向您表示祝贺。中学
4.瞬间动词又叫非延续性动词,还叫终止性动词。瞬间动词可以有现在完成时态,但不可以接一段时间,若要接一段时间,须要做一些相应的变换。瞬间动词在完成时态中的否定式可以接一段时间。
× He has come to Beijing since last year.
√ He has lived in Beijing since last year.
× He has joined the army for 3 years.
√ He has served in the army for 3 years.
√ He joined the army 3 years ago.
√ He has been a soldier for 3 years.
√ It is 3 years since he joined the army.
√ He has joined the army. 他已参军了。
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