there have been a great number of accidents lately.这句话不加been行么?

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therehavebeenagreatnumberofaccidentslately.这句话不加been行么?therehavebeenagreatnumberofaccidentslately.这句

there have been a great number of accidents lately.这句话不加been行么?
there have been a great number of accidents lately.这句话不加been行么?

there have been a great number of accidents lately.这句话不加been行么?
不行

不行

不行,不然不符合句式…

关键问题是最后的时间状语是lately。它是指最近的一段时间内迄今持续发生的情况。所以必须用完成时表达