They have been _____ about what may have caused the fire.(theory)
问题描述:
They have been _____ about what may have caused the fire.(theory)
答
theory是名词,它可以作动词吗???
答
theorifing,现在完成进行时,表示动作一直在进行,have been done表示动作已完成且为被动,而该句中的关系明显是为主动
答
theoried
前面有have been 所以用完成时了 have been done