时态填空Could you tell me if you____the story book before?(read)
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时态填空Could you tell me if you____the story book before?(read)
![时态填空Could you tell me if you____the story book before?(read)](/uploads/image/z/8338352-32-2.jpg?t=%E6%97%B6%E6%80%81%E5%A1%AB%E7%A9%BACould+you+tell+me+if+you____the+story+book+before%3F%28read%29)
答案是:have read
分析:IF 引导的宾语从句,BEFORE 常与现在完成时连用,现在完成时的结构是 have / has +动词的过去分词.( READ的过去分词与原形相同)
加油!不明白再问!
再问: before在句中有时句子是一般过去时,我应该怎么区分时态呢
再答: before ‘ 以前’ 一般与现在完成时连用, before作为介词‘在……之前’ ,可用于一般过去时。
分析:IF 引导的宾语从句,BEFORE 常与现在完成时连用,现在完成时的结构是 have / has +动词的过去分词.( READ的过去分词与原形相同)
加油!不明白再问!
再问: before在句中有时句子是一般过去时,我应该怎么区分时态呢
再答: before ‘ 以前’ 一般与现在完成时连用, before作为介词‘在……之前’ ,可用于一般过去时。
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