会计考友 发表于 2012-8-14 23:32:39

托福语法辅导:连词比较and和or

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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