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11.Since last August,the old ladyhas had (have) bad headaches three to four times a month.

分析 自从去年八月,这位老妇人一个月三到四次头痛得厉害.

解答 答案:has had
分析句子结构可知所给动词have及空格后的bad headaches 即动词短语have bad headaches 在句中作谓语,根据时间状语为since last August"自从去年八月"表示过去已经开始,持续到现在的动作或状态,结合本句语境可知每月老妇人犯3至4次头疼病这种状态从去年8月一直持续到现在,故确定谓语动词的时态为现在完成时,其结构为have/has+动词的过去分词,根据主语the old lady 为第三人称单数,故助动词为has,have的过去分词为had,故填has had

点评 该题为完成句子,首先分析句子结构确定所给动词在句中作谓语,再根据时间状语确定时态,最后套用正确的结构即可写出正确答案.确定正确的时态是本题的关键.

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