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(gè)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(dòng)詞have及空格后的bad headaches 即動(dòng)詞短語(yǔ)have bad headaches 在句中作謂語(yǔ)，根據(jù)時(shí)間狀語(yǔ)為since last August"自從去年八月"表示過(guò)去已經(jīng)開(kāi)始，持續(xù)到現(xiàn)在的動(dòng)作或狀態(tài)，結(jié)合本句語(yǔ)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(yǔ)動(dòng)詞的時(shí)態(tài)為現(xiàn)在完成時(shí)，其結(jié)構(gòu)為have/has+動(dòng)詞的過(guò)去分詞，根據(jù)主語(yǔ)the old lady 為第三人稱單數(shù)，故助動(dòng)詞為has，have的過(guò)去分詞為had，故填has had

點(diǎn)評(píng) 該題為完成句子，首先分析句子結(jié)構(gòu)確定所給動(dòng)詞在句中作謂語(yǔ)，再根據(jù)時(shí)間狀語(yǔ)確定時(shí)態(tài)，最后套用正確的結(jié)構(gòu)即可寫(xiě)出正確答案．確定正確的時(shí)態(tài)是本題的關(guān)鍵．

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