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:
例句:
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。
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。
解析: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.