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1. "I _____ his telephone number." "I have his number, but I ____ to bring my phone book."
A. forget, forget B. forgot, forgot
C. forget, forgot D. forgot, forget
【陷阱】容易误选A，认为"忘记"是现在的事。
【分析】仔细体会一下对话的语境：第一个人说"我忘记他的电话号码了"，这个"忘记"应该是现在的情况，即现在忘记了，要不然就没有必要同对方说此话了，故第一空应填 forget;第二个人说"我有他的号码，但我忘记带电话本了"，这个"忘记"应该是过去的情况，即过去忘记带电话本，所以现在电话本不在身上(注意句中的转折连词 but)，故第二空应填 forgot，即答案选应C.请再看一例：
- Oh, I ______ where he lives.
- Don't you carry your address book?
No, I ______ to bring it.
A. forget, forget B. forgot, forgot
C. forget, forgot D. forgot, forget
答案选C，理由同上。
2. I had hoped to see her off at the station, but I _____ too busy.
A. was B. had been
C. would be D. would have been
【陷阱】容易误选B或D，认为前句用了had hoped，所以此句谓语要用B或D与之呼应。
【分析】但正确答案为A，前一句谓语用had hoped，表示的是过去未曾实现的想法或打算，可以译为"本想"，而后一句说"我太忙"，这是陈述过去的一个事实，所以要用一般过去时。请做以下类似试题(答案均为A)：
(1) We had hoped to catch the 10：20 train, but _____ it was gone.
A. found B. had found
C. would find D. would have found
(2) We had hoped that you would be able to visit us, but you _____.
A. didn't B. hadn't
C. needn't D. would not have
(3) We had wanted to come to see him, but we ____ no time.
A. had B. had had
C. would have D. would have had
(4) I had expected to come over to see you last night, but someone ______ and I couldn't get away.
A. called B. had called
C. would call D. would have called
(5) The traffic accident wouldn't have happened yesterday, but the driver _______ really careless.
A. was B. is
C. were D. had been
3. Dear me! Just _____ at the time! I _____ no idea it was so late.
A. look, have B. looking, had
C. look, had D. looking, have
【陷阱】此题容易误选D，认为第一空用现在分词表伴随，第二空填 have 的一般现在时，以保持与前面时态的一致性。
【分析】其实，此题应选C，第一空应填 look, 因为这是祈使句的谓语;第二空应填 had，因为前一句说"看看时间吧"，这一看当然知道了现在很迟的情形，"不知道这么迟了"显然应是"过去"的事，故应用一般过去时态，许多同学由于忽略这一隐含的语境而误选。
4. "Your phone number again? I _____ quite catch it." "It's 4331577."
A. didn't B. couldn't
C. don't D. can't
【陷阱】此题容易误选C，认为此处要用一般现在时态，表示现在"没听清对方的话"。
【分析】其实，此题答案应选A，根据上文的语境"请把你的电话号码再说一遍好吗?"可知"没听清对方的电话号码"应是在说此话以前，故应用一般过去时态。请看以下类似试题：
(1)"Mr Smith isn't coming tonight." "But he _____."
A. promises B. promised
C. will promise D. had promised
答案选B，"他答应(要来)"应发生在过去。
(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
答案选B，"我没注意"是对方提醒之前的事，现经对方一提醒，当然注意到了。
(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
答案选C."没认出是你"是说此话之前的事，说此话时显然已经认出了对方。
(4)"What's her new telephone number?" "Oh, I _____."
A. forget B. forgot
C. had forgotten D. am forgetting
此题应选A，从语境上看，"忘记"的时间应是现在，即指现在不记得了。
