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CNN news 2010-05-26 加文本

2010-05-26来源:和谐英语

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1.Sheffield says that, by now, he could be making 50,000 to 100,000 gallons of dispersant a day.

现在完成进行时

have been + ing 是“现在完成进行式”，它表示“一直”“始终”的意思。使用时我们最好注意一下与之相伴的某些词或时间状语。

例如：

· How long have you been writing letters?
你（一直在）写信写了有多长时间啦？

· I've been writing letters for an hour (since three o'clock).
我写了有1个小时了。（从3点钟起就一直在写信。）

这种“一直”就是至今仍然在继续的意思。如果我们说：

· He has been helping her with her homework for months.
( 几个月来他一直在帮助她做家庭作业。)

这句话的内涵是：

·He started to help her with her homework months ago, and he still does.
(几个月之前他开始帮助她做作业，他现在仍然在帮她。)