serve 可作...用;服务;对待例句:1. She has served the family faithfully for thirty years.她为这个家忠心耿耿地操劳了30年。2. We are well served with gas in this town.这个城镇煤气供应得很好。3. He served some sweets to the children.他为孩子们拿来他们要买的糖果。offer 提供;出价;企图例句:1. He offered his seat to me.他把座位让给了我。2. There is little work on offer.几乎没有什么工作可找。3. I'll offer you 10 pounds for this book.我出10 磅钱买你这本书。afford 提供,供应得起,给予例句:1. I can't afford a holiday this summer.今年夏天我无法度假。2. These trees afford a pleasant shade.这些树提供了荫凉。3. She can\'t afford a new dress.她没钱买新衣服。