【考例10】 (2003上海春招) When and where to go for

the on ____ salary holiday ____ yet．

A. are not decided

B. have not been decided

C. is not being decided

D. has not been decided

[考查目标]不定式短语作主语时的主谓一致。

[答案与解析]D"疑问句 + to do sth"作主语，其谓语

动词必须使用单数形式，而yet暗示要用完成时态。

【考点4】enough的用法

▲搭配：

① sure enough 果真；确实

② strangely enough 说来也奇怪；奇怪得很

▲句型：(not) adj./ adv. enough to do sth

否定形式可与下列句型相转换：

① too adj. / adv. (for sb) to do

② so adj. / adv. that + 主语 + V(否定形式)

肯定形式可与下列句型相转换：so adj. / adv. that +

主语+V(肯定形式)

My daughter is old enough to dress herself. 我女儿足够

大．可以自己穿衣服了。

The box is not light enough for me to lift. 这盒子不够

轻，我举不起来。

= The box is so heavy that I can't lift it. (注意两句中it

的有无)

The boy is not old enough to join the army．= The boy

is so young that he can't join the army. = The boy is too

young to join the army. 这男孩太小不能参军。

Is the ice hard enough to skate on? 这冰足够结实的可

以站上去吗?

③ Would you be kind / good enough to do sth? 用于邀

请对方千某事, 该句型相当于Would you be so kind

/ good as to do sth?

④ cannot / can never...enough无论怎样也不为过分

⑤ I have had enough. 我吃 / 喝好了。

▲友情提示：作形容词修饰名词时，既可放在其前又可

放在其后。

I didn't have enough time to do the job. = I didn't have

time enough to do the job. 我没有足够的时间来做这工

作。

作副词修饰形容词或副词时。只能放在其后。

They know well enough what we mean. 他们当然懂得

我们的意思。

【考例4】(NMET 2000) ____ to take this adven-

ture course will certainly learn a lot of useful skills.