如题所述
50 dollars作主语时,若指整体,动词用单数;若指多个个体,动词用复数。
There are fifty dollars in my wallet.
Fifty dollars is a small sum of money.
There are fifty dollars in my wallet.
Fifty dollars is a small sum of money.
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第1个回答 2017-02-12
用is虽然dollar后面加了s但要把它看做一个整体所以用is