在定语从句中case，point，situation，stage，point等做先行词，关系副词可以用where，但并不是特定词，而是要结合具体语境。例如：

—What do you think of teaching, Bob?

—I find it fun and challenging. It is a job where you are doing something serious but interesting.

We will discuss a number of cases where beginners of English fail to use the language properly.

He was driving so fast as to get himself into a dangerous situation where he is likely to lose the control over his car.

千万注意：situation, condition, state, activity, job, occasion等做先行词后面的定语从句未必一定就是where，关键还是分析从句中缺什么成分，若缺主表宾，即先行词可以在后面从句中做主表宾，此时需要选用关系代词而不是where，而是which, that ,作宾语还可以省略。例如：

This is the job that he offered to me.

I wasn't clear about the situation that he was in at that moment.

特别提供几个有关stage的例句，请注意它在定语从句中的成分。

The government is at a stage where it is willing to talk.

政府正处于乐于进行会谈的阶段。

This university has reached the stage where they have more graduate students than undergraduates.

这所大学已经发展到了研究生多于本科生的阶段。

Today the industry is at the stage where the silicon chip business was half a century ago.

产业界发展到今天这个阶段，矽晶片工业已经是半个世纪前的产物。

Pace out the hall and see if it is as big as the stage that we shall use for the performance.

用步子量一下大厅，看是不是和我们用来演出的舞台一样大。

The dancers moved with an elegance and grace on the stage that fascinated all the audience.

舞蹈演员们在所有观众为之痴迷的舞台上跳着高雅优美的舞姿。

The salt-related structures experienced four stages which are generation, adjustment, maturation and reactivation.

盐相关构造经历了发育-调整-成熟-再活动4个主要阶段。