Question

这句话是什么从句，结构是什么样的？

Many people who saw the film were afraid to swim in the sea when they remembered the scenes in which people were eaten by the shark.

Answer 1

Many people who saw the film = 名次 就像 =they
were afraid to swim in the sea = afraid
连句 用when
when they rememberd the scenes
解释 用in which 是because 的意思 因为上面用了连词when, 如果不想中断句子就同in which
也可以说 .........the scenes, because they had eaten by the shark

因为是过去式, 要表达saw the film发生第一, 所以描述发生第二的事情 都用were或had + 过去分词. 那样就注重表达第一个句子

简单例子
(people)were afraid to swim
复杂名次
(many people who saw the film) were afraid to swim
复杂名次+ 地点
many people who saw the film were afraid to swim(in the sea)
复杂名次+ 地点+ 解释(为什么会害怕游泳)
many people who saw the film were afraid to swim in the sea(when they rememberd the scenes)
复杂名次+ 地点+ 解释+ (为什么会害怕游泳)+ 解释为什么想起情景就害怕?
many people who saw the film were afraid to swim in the sea when they rememberd the scenes in which people were eaten by the shard.
因为有人被鲨鱼吃掉过
in which= because