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

分析 自從去年八月,這位老婦人一個月三到四次頭痛得厲害.

解答 答案:has had
分析句子結(jié)構(gòu)可知所給動詞have及空格后的bad headaches 即動詞短語have bad headaches 在句中作謂語,根據(jù)時間狀語為since last August"自從去年八月"表示過去已經(jīng)開始,持續(xù)到現(xiàn)在的動作或狀態(tài),結(jié)合本句語境可知每月老婦人犯3至4次頭疼病這種狀態(tài)從去年8月一直持續(xù)到現(xiàn)在,故確定謂語動詞的時態(tài)為現(xiàn)在完成時,其結(jié)構(gòu)為have/has+動詞的過去分詞,根據(jù)主語the old lady 為第三人稱單數(shù),故助動詞為has,have的過去分詞為had,故填has had

點評 該題為完成句子,首先分析句子結(jié)構(gòu)確定所給動詞在句中作謂語,再根據(jù)時間狀語確定時態(tài),最后套用正確的結(jié)構(gòu)即可寫出正確答案.確定正確的時態(tài)是本題的關鍵.

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