搜搜考试网高中英语（反义疑问句）.
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高中英语（反义疑问句）.
They must have gone there last night.(变为反义疑问句)
They must have gone there last night,(didn't they?)为什么回答不是"had't they"?
They must have arrived by now.(变为反义疑问句)
They must have arrived by now,(haven't they?)为什么不是"don't they"?
They must have gone there last night.(变为反义疑问句)
They must have gone there last night,(didn't they?)为什么回答不是"had't they"?
They must have arrived by now.(变为反义疑问句)
They must have arrived by now,(haven't they?)为什么不是"don't they"?
因为末尾有时间,last night是过去时,
by now 是完成时的标志,所以反义疑问句要用完成时
你首先是不知道根据时间标志来判断反义疑问句,其次记不清一些短语代表什么时态.
我在给你总结些现在完成时标志词：
already（肯定）,yet（否定,疑问）,just,before,recently,still,lately,never,ever,never,twice,on several occasion,in the past few days/weeks/months/years,(up to)these few days/weeks/months/years,this morning/week/month/year,just,up to present,so far,up to now,till now,since+时间
by now 是完成时的标志,所以反义疑问句要用完成时
你首先是不知道根据时间标志来判断反义疑问句,其次记不清一些短语代表什么时态.
我在给你总结些现在完成时标志词：
already（肯定）,yet（否定,疑问）,just,before,recently,still,lately,never,ever,never,twice,on several occasion,in the past few days/weeks/months/years,(up to)these few days/weeks/months/years,this morning/week/month/year,just,up to present,so far,up to now,till now,since+时间