过去完成时he had filled a cup with some of the petrol some of the castor oil and some of the vinegar
现在完成时 he has filled a cup with some of the petrol some of the castor oil and some of the vinegar
过去将来时he would fill a cup with some of the petrol some of the castor oil and some of the vinegar
主动变被动
a cup with some of the petrol some of the castor oil and some of the vinegar was filled by him