We visited the old man yesterday.改为否定句:We didn't visit the old man yesterday.
We visited the old man yesterday.改为否定句:We didn't visit the old man yesterday.其中我听别人说时态不变原则,那原句是过去式,改后的句子怎么把visited后面的ed去掉了呢?这是为什么呢,
人气:493 ℃ 时间:2019-10-19 19:39:45
解答
didn't visit整个代表了过去式,有了因为do变为过去式did,所以visit就不用过去式了,这样一日是时态不变原则改为否定句后,是不是要把里面的动词还原呢,我看有些ing形式的就保持原形了。能说说么,建议你还是找本语法书认真看看吧。。。我知道原理。。。但不是专业的。。很难解释清楚。。。不好意思
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