I am drawing on the computer when Jim came to see me yesterday evening 这句话的时态对不对

问题描述:

I am drawing on the computer when Jim came to see me yesterday evening 这句话的时态对不对
是用I am drawing 还是I was drawing

这句话的时态不对.主句应该用was drawing
因为从句用的是一般过去时,所以主句也用过去时
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