例句：The police came here in the hope that they could learn about the cause of the traffic accident.警察来到这希望了解交通事故的原因。
考查语法，in the hope 希望that 引导同位语从句，对hope进行解释说明。
that引导同位语从句，在从句中不做句子成分。主要是要对句子成分进行分析，然后选择合适的连接词
hope用作名词时引导的从句是同位语从句。同位语从句相当于名词，它对其前的名词起补充说明或进一步解释其内容的作用而定语从句的功能相当于形容词，它对其先行词起修饰、描述或限制作用。
例句：
She waited in the forlorn hope that he would one day come back to her.她几乎毫无指望地等待他有一天会回到她的身边。
I knocked loudly in the vain hope that someone might answer.
我敲门敲得很响，希望有人应声，却是徒然。
He asked her again in the vain hope that he could persuade her to come.
他又问了她一次，徒然指望着能说服她来。
He pressed on in the hope that a few others would join him. The tactic paid off.
他硬着头皮干下去，希望能有几个人加入进来。这一招奏效了。
