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1. We haven’t met each other for about 20 yearssince we left Japan.

2. I met Jim last week. We hadn’t met each other

for about twenty years since we left Japan.

第1句用現(xiàn)在完成時(shí), 這大家比較好理解。但是第2句用過(guò)去完成時(shí), 有的考生就感到費(fèi)解了。其實(shí)第2句用過(guò)去完成時(shí)的主要原因是I met Jim last week. 既然“我上個(gè)星期見(jiàn)到了吉姆”, 所以“30 年未見(jiàn)面”顯然應(yīng)在“上星期”這一過(guò)去時(shí)間之前(即“過(guò)去的過(guò)去”), 所以要用過(guò)去完成時(shí)。

11. 這是根據(jù)語(yǔ)境確定時(shí)態(tài)的一道妙題

—Excuse me, sir. Smoking is not allowed here.

—Oh, sorry I ______.

A. don’t know          B. didn’t know         C. haven’t known    D. can’t know

此題應(yīng)選 B。這是一道很好的測(cè)試時(shí)態(tài)的語(yǔ)境題。此題的情景是：一方提醒另一方不準(zhǔn)抽煙, 對(duì)方表示歉意并說(shuō)自己不知道。這里的“不知道”顯然是指對(duì)方“提醒”之前“不知道”(所以用過(guò)去時(shí)態(tài))；假若用一般現(xiàn)在時(shí), 則指在對(duì)方提醒之后還仍然不知道, 這不是很荒唐嗎?

在做時(shí)態(tài)試題時(shí), 要特別注意上下文的語(yǔ)境：

1. —We could have walked to the station; it was so near.

—Yes. A taxi ____ at all necessary.

A. wasn’t                  B. hadn’t been

C. wouldn’t be          D. won’t be

2. —Your phone number again?I____quite catch it.

—It’s 7226109. (m.52ysedu.com)

A. didn’t                   B. couldn’t                C. don’t                    D. can’t

3. —Can I help you, sir?

—Yes. I bought this radio here yesterday, but it _____ work.

A. didn’t                   B. won’t                   C. can’t                    D. doesn’t

4. —Alice, why didn’t you come yesterday?

—I _____, but I had an unexpected visitor.

A. had                      B. would                   C. was going to         D. did

答案：1. A 2. A 3. D 4. C

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