题目内容
18．I this dictionary yesterday．（ ）| A． | have bought | B． | bought | C． | have had | D． | buy |
分析 昨天我买了这本字典．
解答 答案：B．结合yesterday可知这里表达的是过去的事情用一般过去时，buy的过去式是bought，故答案是B．
点评 一般过去时表示过去某个时间里发生的动作或状态；过去习惯性、经常性的动作、行为；过去主语所具备的能力和性格．基本结构：主语+谓语（动词过去式）+句子其他成分；主语+was/were+形容词/名词/介词短语+过去时间；否定形式①was/were+not；②在行为动词前加didn't，同时还原行为动词；一般疑问句Did+主语+do+其他．
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