比较and和or1) 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 dont like chicken _ fish.-I dont like chicken, _ I like fish very much。A. and; and B. and; butC. or; butD. 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 cant live without air o