三. 不定代词
1. 用some还是用any
1) 一般说来,some用于肯定;any用于否定,例如:
There are some letters for you. There arent any letters for me.
2) 疑问句中,一般用any,如问话人心中已经有数,或认为对方会做出肯定回答时,用some。试比较:
Have you any apples? (I cant see any.)
Could I have some of those apples? (which I can see.)
3) 注意其它方式的否定因素也可决定应该用any,如:
I dont think there are any letters.(主句动词否定转移,从句中用any。)
The boy solved the problem without any difficulty. (介词without含否定意味。)
4) any在表示任何(人或物)时,可用于肯定句中:
Oh! Any book will do;I just want something to read on the train.
5) 当说话人心中有数(尽管可能不是具体数字)时,否定句中也用some,如:
Some boys havent done their homework.(肯定有人没做,尽管不一定知道是多少人。)
6) any可用条件从句中,表示情况不明或未定,如:
Let me know if you need any help.(不知道对方是否需要帮助。)
试比较: Let me know if you need some help.(知道能如何提供帮助。)
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