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he then filled a cup with some of the petrol some of the cas

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he then filled a cup with some of the petrol some of the castor oil and some of the vinegar
变过去完成时,还有现在完成时,过去将来时,被动变主动和主动变被动
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he then filled a cup with some of the petrol some of the cas
过去完成时he then 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 then have filled a cup with some of the petrol ,some of the castor oil and some of the vinegar
过去将来时he then had filling a cup with some of the petrol ,some of the castor oil and some of the vinega