谓语动词单复数Ever since Picasso's painting went on exhibit,there ( have been) large crowds at the museum every day.括弧里为什么不能用单数?

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谓语动词单复数Ever since Picasso's painting went on exhibit,there ( have been) large crowds at the museum every day.括弧里为什么不能用单数?

谓语动词单复数Ever since Picasso's painting went on exhibit,there ( have been) large crowds at the museum every day.括弧里为什么不能用单数?
谓语动词单复数
Ever since Picasso's painting went on exhibit,there ( have been) large crowds at the museum every day.括弧里为什么不能用单数?

谓语动词单复数Ever since Picasso's painting went on exhibit,there ( have been) large crowds at the museum every day.括弧里为什么不能用单数?
在there be 句型中,be后面的才是句子的主语,be动词要和主语crowds保持一致,所以用have不用has

crowds意思是人群,而且还有large的修饰,意思是很多人

因为后面是crowds复数,很多人群。