When they find others are in trouble,they will think of the words (that their teacher has said).
括号内的是定从
望采纳想问下动词find 做谓语为什么还要用are?新手求指教嗯，这个其实隐含了一个宾从，补充完整的话，就是When they find (that)....这个that可以省略，所以find后面跟着的是一个句子，are 在这个句子中是谓语（表语）成分希望能够帮到LL