The nice pen cost him ten yuan．The nice pendidn'tcosthim ten yuan．题目和参考答案——青夏教育精英家教网——

题目内容

6．The nice pen cost him ten yuan．（否定句）
The nice pendidn'tcosthim ten yuan．

分析 --这支漂亮的钢笔花费他十元钱．
--这支漂亮的钢笔没花费他十元钱．

解答答案：didn't cost．考查否定句．句意"--这支漂亮的钢笔花费他十元钱．--这支漂亮的钢笔没花费他十元钱．"，主语是pen单数，谓语是cost花费，过去式（过去式就是它本身），因此是一般过去时态，变否定句在实义动词cost前加didn't．实义动词用原形cost．答案是didn't cost．

点评本题考查否定句．通常是在be动词，情态动词后加not．一般现在时态，主语不是第三人称单数用don't，主语是第三人称单数用doesn't．一般过去时态用didn't．还有其它用法需要牢记．

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