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当 a stack of + 复数可数名词,谓语动词可单可复,复多见, stacks of +复数可数名词,谓语动词用复数。 例如: 1.Then a stack of books are brought in from the camp library. 2. Is it because a stack of books is facing me? 3. Stacks of books are nothing if we have no idea how to choose among them. A stack of + 不可数名词,谓语动词用单数: If a stack of paper is left standing in air that is too dry for it, the edges will lose moisture and shrink. Stacks of + 不可数名词,谓语动词一般用复数,单数极罕见: 1. Stacks of paper are piled upon every surface and across virtually every inch of the floor. 2. Those stacks of wood is holding you back from your future man. |
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