题目内容
10．Mr Green，our foreign teacher，______ us English since three years ago．（ ）| A． | taught | B． | teaches | C． | has taught | D． | had taught |
分析 自从三年前，我们的外语老师格林先生就教我们英语．
解答 答案：C
根据since+时间点，选择完成时，又题意中自从三年前开始一直持续到现在，格林先生都在教我们，选择现在完成时，其结构：have/has+及物动词的过去分词．A一般过去时，B一般现在时，C现在完成时，D过去完成时时，故选C．
点评 本题主要考查现在完成时，表示从过去开始一直持续到现在的动作或状态，常与表示一段时间的for短语、since短语或从句连用．
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