3．I like the English songs and they        many times on the radio．（　�。�
A．have been taughtB．have taught
C．had been taughtD．had taught

分析 我很喜歡這些英文歌曲它們在收音機上被教過好多次了．

解答 答案是A．考查被動語態(tài)，分析句子并列句中的主語是they指的是英文歌曲，歌曲與動詞teach是被動關(guān)系，根據(jù)語境已經(jīng)教了好多次了，所以用現(xiàn)在完成時，故答案選A．

點評 被動語態(tài)由"助動詞be+及物動詞的過去分詞"構(gòu)成．被動語態(tài)的時態(tài)變化只改變be的形式，過去分詞部分不變．疑問式和否定式的變化也如此．掌握各種時態(tài)的被動語態(tài)是解題的關(guān)鍵．

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