1．John _______ such a thing about you．He never speaks ill of you behind your back..（　�。�
A．can't have saidB．might not have said
C．couldn't sayD．mustn't have said

分析 約翰不可能說那樣的關(guān)于你事．他從來不在你背后說壞話．

解答 答案是A．本題考查表示推測的情態(tài)動詞的用法．情態(tài)動詞must表示推測只能出現(xiàn)在肯定句中，表示有客觀依據(jù)的推測"準(zhǔn)是，一定是"，所以排除D；might表示推測往往出現(xiàn)在肯定句或否定句中表示不太肯定是推測"也許"；can/could表示推測往往出現(xiàn)在否定句中，表示"不可能"；根據(jù)下文"他從不在背后說壞話"推斷"John不可能那么說你"，排除B．對已經(jīng)發(fā)生的事件的說明用"情態(tài)動詞+have done"的結(jié)構(gòu)，所以答案是A．

點評 在正確理解情態(tài)動詞的基本含義的基礎(chǔ)上，整體理解語境中的情感態(tài)度，做出合理的判斷．

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