时间、距离、金额作主语时谓语动词形式
表示时间、距离、度量、重量、金额等的复数名词作主语,被看作整体时,谓语动词用单数;若强调个体也可以复数。如:
Twenty years is a long time. 二十年是很长时间。
Two kilometers is a long way to go on foot. 步行两千米是一段很长的路程。
Six months have passed, and we still have no news of them. 六个月过去了,我们依然没有他们的消息。
比较:
Ten dollars is too much for this old coin. 这个古币没有10块钱这么高的价格。
Three dollars were paid for the old coin. 那个古钱花了3块钱。
Twenty years is a long time. 20年是一段很长的时间。
Twenty years have passed since they got married. 他们结婚已有20年了。
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