题目内容
9．-How ______ he ______ to school yesterday？-By bus．（ ）| A． | did，go | B． | has，gone | C． | does，go |
分析 --昨天他怎样去上学的？
--乘坐公交车．
解答 答案：A．
根据题干"昨天他怎样去上学的？"结合时间状语yesterday，即提问过去的动作开始的时间，所以用一般过去时，这是一个特殊疑问句，特殊疑问句的构成是：特殊疑问词+一般疑问句，由于有实意动词go，所以一般过去时的疑问句应借助于助动词did．前面使用了助动词，后面的谓语动词要使用原形go．故答案为A．
点评 本题考查了动词的时态．做题时，一定要特别关注有关的时间短语，这是判断句子时态的标志．在没有时间状语的情况下可以联系上下文根据语境来做出正确判断．
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