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中考英語知識點(diǎn):and與or的比較 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and 也可用于否定句。請注意
中考英語知識點(diǎn):and與or的比較
1) 并列結(jié)構(gòu)中,or通常用于否定句,and用于肯定句?! ?) 但有時and 也可用于否定句。請注意其不同特點(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,但含有兩個否定詞的句子實(shí)際被看作是肯定結(jié)構(gòu),因此要用and?! 〉湫屠} ---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?! ∨袛喔腻e: (錯) We will die without air and water. (錯) We can't live without air or water. (對) We will die without air or water. (對) We can't live without air and water. 3 )表示選擇的并列結(jié)構(gòu) (1) or 意思為"否則"?! must work hard, or I'll fail in the exam. (2) either…or 意思為"或者……或者……"。注意謂語動詞采用就近原則。
Either you or I am right. 判斷改錯: (錯) They sat down and talk about something. (錯) They started to dance and sang. (錯) I saw two men sitting behind and whisper there. (對) They sat down and talked about something. (對) They started to dance and sing. (對)I saw two men sitting behind and whispering there. 解析: 第一句: and 連接兩個并列的謂語,所以 talk 應(yīng)改為 talked?! 〉诙洌篴nd 連接兩個并列的動詞不定式,第二個不定式往往省略to,因此sang 應(yīng)改為 sing?! 〉谌洌篴nd 連接感觀動詞saw 后面的用作的賓補(bǔ)的兩個并列分詞結(jié)構(gòu),因此whisper應(yīng)改為whispering?! ∽⒁猓篴nd 還可以和祈使句或名詞詞組連用表示條件。(or也有此用法) Make up your mind, and you'll get the chance. = If you make up your mind, you'll get the chance. One more effort, and you'll succeed. = If you make one more effort, you'll succeed.
本文標(biāo)題:中考英語知識點(diǎn):and與or的比較
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