I have been over my homework for three hours

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IhavebeenovermyhomeworkforthreehoursIhavebeenovermyhomeworkforthreehoursIhavebeenovermyhomeworkforth

I have been over my homework for three hours
I have been over my homework for three hours

I have been over my homework for three hours
不对.应该:I have finished my homework for three hours.用现在完成时表示.我已经完成作业3个小时了.

应该把OVER改成finished

wrong,语法错误