[连词]比较and和or
教程:小学英语语法  浏览:718  
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      1) 并列结构中,or通常用于否定句,and用于肯定句。

      2) 但有时and 也可用于否定句。请注意其不同特点:

      There is no air or water in the moon.

      There is no air and no water on the moon.

      在否定中并列结构用or 连接,但含有两个否定词的句子实际被看作是肯定结构,因此要用and.

      典型例题

      ——I don't like chicken ___ fish.

      ——I don't like chicken, ___ I like fish very much.

      A. and; and  B. and; but C. or; but D. or;and

      答案C.否定句中表并列用or, but 表转折。

      判断改错:(错)We will die without air and water.

      (错)We can't live without air or water.

      (对)We will die without air or water.

      (对)We can't live without air and water.

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