四、考查why not的隐含时态

按英语习惯，why not…结构只用于提出建议，不用于表示责备，即只用于指将来的情况，而不用于指过去情况。如：

我那时是能借钱给你的。你为什么没有向我借?

误：I could have lent you the money. Why not ask me?

正：I could have lent you the money. Why didn’t you ask me?

我喊你的名字的时候，你为什么不来?

误：Why not come when I called your name?

正：Why didn’t you come when I called your name?

五、用于某些特殊表达中

如用于I don’t see why not，其意为“没问题”“好呀”。如：

—Can we go to the park? 我们去公园吧。

—I don’t see why not. 好呀。(from www.nmet168.com)

【模拟训练】

01. —It’s a long time since I saw my sister.

—______ her this weekend?

A. Why not visit            B. Why not to visit

C. Why not visiting        D. Why don’t visit

02. Why ______ your luck downtown, Bob? That’s where the best jobs are.

A. not try                      B. not to try

C. not trying                  D. not tried

03. —Let’s go to the cinema this evening, OK?

—______

A. Not at all.                  B. Why not?     

C. Never mind.              D. What of it?

04. —Shall we eat Italian food tonight?

—Yes, ______

A. You’re welcome.       B. Why not?

C. No problem.              D. Not much

05. —We could invite John and Barbara.

—Yes, ______

A. So what?                   B. Why not?     

C. Not really.                  D. Never mind.

06. —______ buy any bread?

—Sorry, I forgot.

A. Why not                     B. Why don’t

C. Why don’t you            D. Why didn’t you

07. If you want to sell your old sofa, ______ put an advertisement in the local paper?

A. why not                      B. why to         

C. why don’t                   D. why didn’t

08. —Would you like to try some raw fish?

—______, I’ll try anything once.

A. No wonder                  B. Which one

C. Never mind                  D. Why not

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