Which sentence contains a being-versus-been error in a past continuous passive?
The stage was being lit when the doors opened.
The uniforms were been washed when the pipe burst.✓الإجابة الصحيحة
The horses were being fed when we arrived.
The path was being cleared during the storm.
الشرح
The sentence about the uniforms contains the error because an action in progress at that past moment needs were being washed. Were been washed incorrectly inserts the perfect marker into a continuous passive.