关于a good two hours的疑问

问题描述

It took us a good two hours to finish the work.
请老师分析一下句子中 a good two hours 的用法。为啥将不定冠词用在一个复数短语前呢？

老师答疑

沅老师：

▲a good two hours 的意思是“足足两小时”：

It took us agood two hours to finish the work. 完成此项工作花了我们足足两小时。

▲此类用法的基本特点是：不定冠词后面的这个复数短语通常是表示量度或数量等的名词词组，且这个复数形式的名词词组前通常应用一个形容词修饰，其中最典型的形容词就是good。如：

We waited for a good hour. 我们足足等了一小时。

It's a good three miles to the station. 离车站至少三英里。

He’s been waiting for a good twenty-five minutes. 他已经等了整整25分钟了。

The pub whereI had arranged to meet Nobby was a good five minutes walk further on. 我约诺比见面的那家酒馆至少得再走5分钟才到。

▲其他例句如：

I’ve had a very busy three days. 这3天我十分忙。

We’ll need an extra ten pounds. 我们还需要另加10英镑。

Our speed over the ground was a miserable 2.2 knots. 我们在接近地面时的航速仅为2.2节。

She spent a happy ten minutes looking through the photos. 她花了10分钟高兴地仔细看照片。

You canreview your policy in detail for a full 15 days without obligation. 您可以在15天的免费体验期内仔细审核保单细则。

胡老师：

谢谢老师！