4．--Doctor，I caught a bad cold，and I had a sore throat．
--How long _______like this？（　�。�
A．did youB．have you beenC．were you

分析 ---醫(yī)生，我重感冒，嗓子疼．
---這樣有多久了．

解答 答案：B．
結(jié)合句意可知是詢問像這樣be like this多久了，動作發(fā)生在過去，持續(xù)了一段時間，故用現(xiàn)在完成時have/has+過去分詞，主語you，故have，be的過去分詞been，故答案是B．

點評 現(xiàn)在完成時有兩種用法1．過去發(fā)生的某一動作對現(xiàn)在造成的影響或結(jié)果或到現(xiàn)在為止已經(jīng)發(fā)生或完成的動作．2．表示過去發(fā)生的、持續(xù)到現(xiàn)在的動作或狀態(tài)．

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