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I came across a sentence which reads:
We spent a lovely three weeks in Canada.
Also sentences which read:
- A staggering 100 students attended the fee class.
- We have reached an amazing 1000 members this month.
My question is why to use 'a/an' where there are plural numbers like 'three weeks', '100 students', '1000 members'.
You could also say, "We spent three lovely weeks in Canada." However you can't say, "We spend lovely three weeks in Canada." @JavaLatte explained it. – WRX – 2017-03-13T18:34:21.247