比較and和or

字號(hào):

比較and和or
    1) 并列結(jié)構(gòu)中,or通常用于否定句,and用于肯定句。
    2) 但有時(shí)and 也可用于否定句。請(qǐng)注意其不同特點(diǎn):
     There is no air or water in the moon.
     There is no air and no water on the moon.
    在否定中并列結(jié)構(gòu)用or 連接,但含有兩個(gè)否定詞的句子實(shí)際被看作是肯定結(jié)構(gòu),因此要用and。
    典型例題
    ---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 表轉(zhuǎn)折。
    判斷改錯(cuò):
    (錯(cuò)) We will die without air and water.
    (錯(cuò)) We can't live without air or water.
    (對(duì)) We will die without air or water.
    (對(duì)) We can't live without air and water.