There were many sheep on the farm last year.为什么填were?

There were many sheep on the farm last year.为什么填were?

题目
There were many sheep on the farm last year.为什么填were?
答案
last year 指“去年”,是过去时间,所以be动词用过去式形式,再者,主语是sheep,是复数名词,所以用were.
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