②find sb. out 发现……的错事（或罪行）
例：He lived in fear of being found out.
他终日惶恐不安，生怕东窗事发。
相关俚语：be generous to a fault 极为慷慨
例：She's a really sweet person and she's generous to a fault.
她是个非常善良的人，而且十分慷慨。

2.allow for 顾及，考虑到
例：We have to allow for the possibility that we might not finish on schedule.
我们必须考虑到我们有可能不能按时完成。
常见搭配：
①allow sb. to do sth. 允许某人做某事
例：Do you think Dad will allow you to go to Jamie's party?
你认为爸爸会允许你去参加杰米的聚会吗？
②allow of sth. 容许
例：This rule allows of no exceptions.
必须严格遵守这一规则，没有例外。

3.call on sb. 短暂拜访……
例：I thought we might call on your mother on our way.
我觉得我们可以顺道看看你母亲。
常见搭配：
①call sb. out 请……来做某工作
例：We had to call out a doctor.
我们不得不请一位医生来。
②call sth. up 显示，调出
例：You can use the search facility to call up all the occurrences of a particular word in a document.
你能利用查询功能调出某个特定的词在文件中出现的情况。
相关俚语：sth. is calling you 诱惑；召唤
例：That last piece of chocolate cake is calling me.
最后一块巧克力蛋糕正诱惑着我。

长难句解析

Her favourite walk, and where she frequently went while the others were calling on Lady Catherine, was along the open grove which edged that side of the park, where there was a nice sheltered path, which no one seemed to value but herself, and where she felt beyond the reach of Lady Catherine's curiosity.

别人去拜访咖苔琳夫人的时候，她总是爱到花园旁边那片小林子里去散散步，那儿有一条很美的绿荫小径，她觉得那地方只有她一人懂得欣赏，而且到了那儿，也就可以免得惹起咖苔琳夫人的好奇心。

解：主语+时间状语从句+系动词+表语+定语从句

析：“where she frequently went”是由where引导的主语从句；“which edged…where there was…which no one…where she felt…”是4个并列的定语从句，都修饰先行词the open grove，第一个关系代词which在从句中作主语，第二个关系代词which在从句中作宾语，两个关系副词where都在各自引导的定语从句中作地点状语。