中考英语知识点:and与or的比较
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中考英语知识点:and与or的比较 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. 3 )表示选择的并列结构 (1) or 意思为"否则"。 I must work hard, or I'll fail in the exam. (2) either…or 意思为"或者……或者……"。注意谓语动词采用就近原则。 (责任编辑:admin) |