2018-2019学年度牛津版选修6 Unit 4 Helping people around the world-grammar课件(32PPT)
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 1)If I were a bird, I would fly in the sky. 2)If I had taken your advice ,I wouldn’t have made the mistake. 3)If I had been there, it wouldn’t have happened. 4)If it rained tomorrow, we would not go shopping.