小铃铛MISS
sum 和 some 是同音词，即它们发音是相同的，单独读是无法辨别的。只要连成词组就可以分辨了。如后面是books, water, friends ... 就可断定是some 不是sum。如后面出现up，或者前面出现冠词a，the，肯定是sum 。
诗酒趁年少r
sum[英][sʌm][美][sʌm]n.总数；算术；金额；概略，要点vt.& vi.总计；总结，概括；归纳复数: sums 第三人称单数: sums 过去式: summed 过去分词: summed 现在分词: summing双语例句1.He was paid an undisclosed sum.他得到了一笔数目不详的钱。2.For his first book he received the princely sum of $400.他写第一本书得到了 400 元“巨款”。3.You have only 100 words in which to sum up his speech.你只能用100字来概括他的讲话。4.The gangsters offered him a sum equivalent to a whole year's earnings.歹徒提出要给他一笔相当于他一年收入的钱。5.An enormous sum of money is injected each year into teaching.每年都有大量资金投入到教学中。
