英语语法：or/nor知识点汇总
1.   否定和or: 前后两个都否定时用or/nor
I have no brothers or sisters. （没有哥哥、也没有姐姐）
I have no brothers and no sisters. （用and的话,要重复否定词）
I have no brothers and nor do I have sisters.（nor在句首，用部分倒装式）

2.   祈使句和or：
祈使句 + or/otherwise + S will/can…（=否定条件句，“否则”）
祈使句 + and        + S will/can…（=肯定条件句，“就会”）
Hurry up, or you will be late. 快点，否则你要迟到了。
Study hard and you can keep up with others. 努力些，你就能赶上其他人了。
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3.   平行结构和or：并列同等成分的词、短语或句子,并使用同一种形式
either...or
whether...or (not)
‘When will you get the results?’  ‘Either tomorrow or the day after.’
You don’t care whether he lives or dies, do you?
The jury must decide whether the prisoner is guilty or not.

4.   副词词组和or
or rather  或者说；更准确地说（exactly/technically/strictly speaking）
or else否则（=otherwise）
or so 大约（跟在数量词后，意思相当于about/around/approximately）
This is a problem for the government, or rather for the Prime Minister, to deal with.
It must be something serious, or else they wouldn’t have radioed for help.
It was among the 400 or so pictures Monet painted at Giverny.

5.   主谓一致和or：适用于就近原则（同neither…nor\not only…but also等）
Either they or Jimis going to Shanghai next Saturday.
Neither you nor Iam wrong.
Not only the students but also the teacher wishes for a holiday.

完成句子
1．What a table! I've never seen such a thing before.It is ________(不到两倍)  it is long.
2．Many people have donated that type of blood，but the blood bank needs ________(更多)．
3．The girl found the T­shirt sold online was ________(价格的一半) that in the supermarket.
4．Men are equally as good as women at taking care of others；________(甚至更好)，male nurses can be a great help in keeping patients still while they receive painful treatment.
5．I do think Tom's conduct that evening was，________(至少可以说)，strange.
6．The Yellow Mountain is ________(那么著名的) tourist attraction that millions of people pour in every year.
7．—How do you like your new roommate?
—He is too ________(太小气)．He never shares his snacks with me.
8．—Are you content with Ang Lee's new film Life of Pi?
—Not a little.________(再也没有比它更好的了)．
9．Worried about the time ________(可以利用的) Mary had made a list of the sites she wanted to see in Beijing.
10．Mike did the homework ________(三分之一的时间)  it took me.
答案 1.not half/twice as wide as 2.more 3.half the price of 4.better yet/even better/still better/better still 5.to say the least 6.such a well­known/so well­known a 7.mean 8.It couldn't be any better 9.available 10．one­third the time

翻译句子
1．我从未听过比这更让我震惊的事情。
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2．那是个非常感人的故事。
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3．两兄弟中约翰更勇敢些。
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4．你不如你弟弟细心。
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5．广州是中国最大的城市之一。
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答案 1.I haven't heard a more surprising thing than this.
2．It is a most touching story.
3．John is the braver of the two brothers.
4．You are less careful than your brother.
5．Guangzhou is one of the largest cities in China.