請看下面的題目：
“Your phone number again? I _________ quite catch it.” “It’s 4331577”
A. didn’t?????????????? B. couldn’t???????????? C. don’t??????????????? D. can’t

【分析】此題容易誤選C，認為此處要用一般現在時態(tài)，表示現在“沒聽清對方的話”。其實，此題答案應選A，根據上文的語境“請把你的電話號碼再說一遍好嗎?”可知“沒聽清對方的電話號碼”應是在說此話以前，故應用一般過去時態(tài)。請看以下類似試題：

(1) “Mr Smith isn’t coming tonight.” “ But he _________.”
A. promises????????????? B. promised????????????? C. will promise????????? D. had promised
答案選B，“他答應(要來)”應發(fā)生在過去。

(2) “Hey, look where you are going!” “Oh, I’m terribly sorry. _________.”
A. I’m not noticing??? B. I wasn’t noticing?? C. I haven’t noticed?? D. I don’t notice
答案選B，“我沒注意”是對方提醒之前的事，現經對方一提醒，當然注意到了。

(3) “Oh it’s you ! I _________ you.” “I’ve had my hair cut.”
A. didn’t realize???????? B. haven’t realized???? C. didn’t recognize??? D. don’t recognized? 答案選C。“沒認出是你”是說此話之前的事，說此話時顯然已經認出了對方。

(4) “What’s her new telephone number?” “Oh, I _________.”
A. forget?????????????????? B. forgot?????????????????? C. had forgotten??????? D. am forgetting
此題應選A，從語境上看，“忘記”的時間應是現在，即指現在不記得了。

(5) “Since you’ve agreed to go, why aren’t you getting ready?” “But I _________ that you would have me start at once.”
A. don’t realize????????? B. didn’t realize???????? C. hadn’t realized?????? D. haven’t realized
答案選B?！皼]意識到”是對方提醒之前的事。

(6) “It’s twelve o’clock, I think I must be off now.” “Oh, really? I _________ it at all.”
A. don’t realize????? B. haven’t realized???? C. didn’t realize???????? D. hadn’t realized
答案選C?！皼]意識到”是在聽到的話之前的事。